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The vehicle shall not be operated at a speed which will endanger the driver or traffic.
On curves, the vehicle speed shall be limited so that it can be stopped within one-half the visible distance of the roadway.
(b) (9-23) (9-24) Haulage vehicles shall at all time be operated under positive control. When descending grades, the vehicle shall be kept in gear.
(c) (9-5) Where other warning signals are not provided, the vehicle's warning device shall be sounded before moving the haulage vehicle.
(d) (9-45) The loaded haulage vehicle shall not be moved away from the shovel or loader until the load is balanced and trimmed.
(e) Haulage vehicles shall not be driven unnecessarily while the body is in the dump position.
(f) No workman shall be permitted under the raised body of a haulage vehicle until such body is secured in its raised position.
(g) The hands or feet shall not be used to guide a hoist or winch cable on a haulage vehicle. When necessary to control a moving cable, the drum and sheaves shall be equipped with a device that will guide the cable to its proper position without being handled, or the employee shall be provided with a device which will enable him to guide the cable safely.
(h) (9-12) Cabs of mobile equipment shall be kept free of extraneous materials.
(i) (9-45) Equipment which is to be hauled shall be loaded and protected so as to prevent sliding or spillage.
(j) (9-58) If truck spotters are used, they shall be well in the clear while trucks are backing into dumping position and dumping; lights shall be used at night to direct trucks.
(k) (9-68) Lights, flares, or other warning devices shall be posted when parked equipment creates a hazard to vehicular traffic.




s 7023. Industrial Railroads.
(a) (9-83) The tracks for all industrial railroads in use in the mine or on the surface shall be kept in good condition, free of dips, bumps, or obstructions that may interfere with safe operation of haulage equipment. Surface industrial railroads and clearances shall comply with the Industrial Railroad standards of the General Industry Safety Orders.
(b) All bridges and trestles shall be substantially constructed and maintained in good repair. They shall not be subjected to loads greater than they were designed to support.
It is recommended that bridge and trestle timbers be treated with an effective preservative before being used.
(c) (9-20) Positive-acting stopblocks, derail devices, track skates, or other adequate means shall be installed wherever necessary to protect persons from runaway or moving railroad equipment.
(d) (9-28) Switch throws shall be installed so as to provide adequate clearance for switchmen.




s 7024. Mine Trains -Equipment and Practice.
(a) (9-9) Every locomotive shall be provided with an audible warning device capable of being heard at a distance of 200 feet. Such a warning device shall be maintained in good working condition.
Operators shall sound warning before starting trains, when trains approach crossings or other trains on adjacent tracks, and where vision is obscured.
(b) Locomotives or trains operating at night shall be equipped with front and rear lights.
(c) Locomotives shall be equipped at both ends with adequate footboards and grab irons.
(d) (9-48) Every locomotive shall be equipped with brakes of sufficient capacity to control the train with reasonable safety and railroad cars with braking systems shall be equipped with effective brake shoes.
(e) (9-3) Before a locomotive is moved, the engineer shall make certain that the brakes are in operating condition. When the locomotive is not in operation the hand brake shall be set.
(f) No locomotive shall be left unattended unless it is locked or otherwise made inoperable.
(g) (9-98) Locomotives and cars moved by locomotives that are coupled and uncoupled in the course of their regular operation shall be equipped with automatic couplings with extension handles.
(h) Dump cars shall be equipped with positive locking devices to prevent accidental dumping.
(i) (9-97) Couplings shall not be shifted or lined up on moving cars or locomotives. If the couplings are not in line, the car or locomotive shall be stopped before they are shifted. Employees shall not stand on the rail while coupling or uncoupling cars.
(j) (9-47) When cars are uncoupled from a train they shall be secured against accidental movement.
(k) (9-45) No materials shall be carried on any locomotive unless such locomotive is equipped so that the materials can be carried safely.
Materials may be carried on locomotives equipped with fixed boxes or trays or with raised edges high enough to keep the materials safely in place.
No material that extends over the side or end of a locomotive shall be carried on the locomotive.
( l) (9-45) The material on loaded cars shall be balanced and trimmed in order to prevent dislodging during transportation.
(m) Railroad equipment shall not be operated at a speed which will endanger employees.
(n) (9-50) Railcars shall not be left on side tracks unless ample clearance is provided for traffic on adjacent tracks.
(o) (9-51) Persons shall not go over, under, or between cars unless the train is stopped and the motorman has been notified and the notice acknowledged.
(p) (9-52) Inability of a motorman to clearly recognize his brakeman's signals, when the train is under the direction of the brakeman, shall be construed by the motorman as a stop signal.
(q) (9-54) A bumper or other device that will effectively prevent cars from going over the end of the track shall be provided at all dump points for ore or waste.
(r) (9-54) Safety chains, or other equally effective devices, shall be used to keep the cars from overturning while being dumped.




s 7025. Mine Trains -Equipment and Practices.
(a) Every new locomotive purchased after October 27, 1958 shall be equipped with some type of dead-man control that will shut off the power automatically when the operator leaves his compartment. Where practical, existing locomotives shall be equipped with such controls.
(b) Rerailing equipment shall be available and used to put derailed cars and locomotives on the track. It is recommended that rerailers and jacks be provided.
(c) Every locomotive when in motion shall continuously display a white light in the direction of travel which will provide sufficient illumination to make men or objects clearly visible at a distance of 100 feet in the direction in which the locomotive is traveling.
(d) Each train shall be equipped with a red taillight of sufficient intensity as to be clearly visible from a distance of 100 feet.
(e) A safe seat shall be provided for the operator of every locomotive. The seat shall be constructed so it will prevent the operator from accidentally slipping over the back or sides of the seat.
(f) To prevent runaway cars should a coupling part, the locomotive shall be operated on the downgrade end of the train, except:
(1) When transporting workers. (See Section 7038.)
(2) When transporting materials which cannot be pushed safely.

(3) When the construction of a locomotive is such that it seriously obstructs the operator's view of the roadway; in which case, the locomotive shall be placed ahead of the train with the seat end turned in the direction in which the locomotive is traveling.
(g) (9-45) Timber or similar material that extends over the side or end of a mine car shall be secured and positioned so that it will clear obstructions, especially when traveling around curves.




s 7026. Mechanical Haulage Refuge Stations.
(a) (9-110) Refuge stations for pedestrians shall be provided at intervals not exceeding 200 feet along the haulageway on every mine level where a 30-inch passageway cannot be maintained.
(b) Each refuge station shall be not less than 4 feet long and shall afford a space at least 2 1/2 feet in width between the widest portion of the car or train running on the railroad track and the side of the refuge.
(c) Refuge stations shall be plainly marked and kept free of rubbish.
(d) Ample passing space shall be provided along haulageways where trackless haulage is used.




s 7030. Conveyors.
(a) (14-1) Screw conveyors 7 feet or less above floor or other working level shall be completely covered with substantial lids except that screw conveyors the top of which is 2 feet or less above the floor or other working level, or below the floor level may be guarded by standard railing guards having toeboards of midrail height or shall be guarded by substantial covers or gratings.
(b) All belt conveyor head pulleys, tail pulleys, single tension pulleys and dip take-up pulleys shall be so guarded that the entire sides of the pulleys are covered. The guard shall extend in the direction of the run of the belt to such a distance that a person cannot reach behind it and become caught in the nip point between the belt and pulley.
(c) Portable inclined conveyors shall have head and tail pulleys or sprockets and other power transmission equipment guarded according to the General Industry Safety Orders of the division.
(d) (11-2) (11-13) (11-14) Crossovers shall be provided and used where it is necessary to pass over exposed chain, belt, bucket, screw, or roller conveyors. Such crossovers shall be bridges or runways properly equipped with standard railings and toeboards, and shall have a fixed ladder, ramp, or stairway as a safe means of access.
(e) Conveyors passing over areas that are occupied or used by employees shall be so guarded as to prevent the material handled from falling on or causing injury to employees.
(f) Where workmen pass under the return strands of chain conveyors, a shallow trough or other effective means of sufficient strength to carry the weight of the broken chain shall be provided.
(g) (9-14) No employee shall be permitted to ride a power-driven chain, belt or bucket conveyor.
(h) (9-6) When the entire length of a conveyor is visible from the starting switch, the operator shall visually check to make certain that all persons are in the clear before starting the conveyor. When the entire length of the conveyor is not visible from the starting switch, a positive audible or visible warning system shall be installed and operated to warn persons that the conveyor will be started.
(i) (9-7) Unguarded conveyors with walkways shall be equipped with emergency stop devices or cords along their full length.
(j) (9-13) Adequate backstops or brakes shall be installed on inclined-conveyor drive units to prevent conveyors from running in reverse if a hazard to personnel would be caused.




s 7031. Conveyor Passage.
(a) (11-9) Safe passageway shall be provided along every pit conveyor where employees are required or permitted to travel in the course of their operating duties.
(b) Conveyor tunnels constructed after April 7, 1953 shall have an unobstructed passageway at least 2 feet wide and 6 1/2 feet high.
When a tunnel constructed before April 7, 1953 is extensively repaired or rebuilt, an unobstructed passageway shall be provided as required in the foregoing paragraph of this subsection.
(c) (11-16) Passageways adjacent to conveyors shall be kept free of spillage from the conveyor. Means shall be taken to minimize spillage on the passageway.




s 7032. Belt Conveyors in Mines.
(a) Before a belt conveyor is installed in an underground mine, permission shall be secured in writing from the Division.
(b) Conveyor belting used underground shall be of a type that is acceptable to the Division.
(c) When application is made to install a conveyor in a mine, information regarding the following shall be submitted to the Division:
(1) Service for which the conveyor is intended.
(2) Width and length of conveyor.
(3) Size of passageway in which the conveyor will operate.
(4) Kind of automatic devices that will be provided to shut off the power should the belt stop.
(5) Fire protection to be provided.
(6) Any other information considered pertinent by the Division.
(d) When in the opinion of the Division a belt conveyor can be operated safely in a mine, permission may be granted to the applicant, specifying the conditions under which such belt conveyor shall be operated.
(e) When permission to use a belt conveyor is granted, the conditions specified are those believed necessary for the protection of workers. If experience in the operation of the belt conveyor indicates that any of the conditions are inadequate or unnecessary, the Division may revise the conditions in the light of such experience.
(f) Permission to use a belt conveyor underground may be revoked for failure to comply with the conditions specified by the Division.




s 7035. Aerial Tramway.
(a) (10-8b) Every aerial tramway, the operation of which requires the presence of employees at both ends of the tramway, shall be provided with direct connected telephone or other equally ready means of quick communication.
(b) (10-8d) No employees, except maintenance and repair men designated by the employer, shall be permitted to ride on any aerial tramway unless such tramway was designed for transportation of passengers.
(c) (10-8c) Tramways used for transportation of employees shall be provided with suitable stand-by power for emergency use, and a safe conveyance for employees to ride in.
(d) (10-7) Working areas under tramways shall be guarded by a substantial roof or other adequate protection against falling buckets or falling materials.
(e) (10-8a) The hoisting equipment and hoisting practices for inclined tramlines over which employees are transported shall be in compliance with the Aerial Passenger Tram Safety Orders of the Division.
(f) (10-3) Any hazardous defects shall be corrected before the equipment is used.
(g) (10-9) Men shall not ride loaded buckets.
(h) (10-10) Where possible, aerial tramways shall not be started until the operator has ascertained that everyone is in the clear.




s 7037. Transportation of Workers.
(a) When transporting employees by vehicles, the vehicles and procedures shall be in compliance with the General Industry Safety Orders of the Division.
(b) (9-33) Men shall not ride in dippers, shovel buckets, forks, clamshells, or in the beds of dump trucks for the purpose of transportation.
(c) (9-40) Men shall not ride on top of loaded haulage equipment.
(d) (9-41) Only authorized persons shall be permitted to ride on trains or locomotives and they shall ride in a safe position.
(e) (9-43) Men shall not ride outside the cabs or beds of mobile equipment.
(f) (9-67) Facilities used to transport men to and from work areas shall not be overcrowded.
(g) (9-85) Supplies, materials, and tools other than small hand tools shall not be transported with men in man trip vehicles unless such vehicles are specifically designed to make such transportation safe.





s 7038. Transportation of Employees.
(a) Except as provided in subsection (b) of this section, transportation of employees over mine railroads when going on or coming off shift shall be in man cars especially designed for such transportation.
(b) Where not more than five men are going on or coming off shift, they may be transported in mine cars.
(c) All man cars and mine cars carrying men going on or coming off shift shall be secured with safety chains to prevent such cars from running away should a coupling fail.
(d) Every mine car used for transportation of employees shall be provided with a positive locking device that will prevent accidental dumping of the car.
(e) A train transporting workers shall be pulled, not pushed, by the locomotive, and shall be operated at a safe speed.
(f) (9-67) Every man car or mine car, truck, or other vehicle used for transportation of employees shall be provided with safe and secure seats, and shall be protected on sides and ends to prevent falls from the vehicle.
Means shall be provided whereby employees can safely mount or dismount the vehicle.
(g) (9-113) Vehicles transporting workers shall be operated cautiously and with due regard for the safety of employees. Such vehicles shall be operated at a safe speed.
(h) (9-114) Employees shall not be required or permitted to get on or off a moving vehicle.
(i) (9-99) Supplies, materials, and tools other than small hand tools shall not be transported with men in man trip cars or vehicles. Man trips shall be operated independently of ore and supply trips.
(j) (9-116) During shift changes, the movement of rock or material trains shall be limited to areas where such trains could not present a hazard to men coming on or going off shift.
(k) (9-117) Men shall not ride between cars or on top of loaded cars.




s 7040. (11-3) (11-5) (11-6). Ladders.
Ladders used in surface operations shall be constructed, installed, and maintained in conformance with provisions of the General Industry Safety Orders.




s 7041. (11-3) (11-5). Construction of Wooden Ladders for Underground Use.
(a) Wooden ladders shall be substantially constructed of sound lumber of strength equivalent to No. 1 Select Douglas Fir of the following dimensions:
(1) Side rails shall be not less than 2 inches by 4 inches nominal, in cross section.

(2) Ladder steps shall be clear, straight-grained, and absolutely free of knots.
(3) Ladder steps shall be not less than 1 inch by 4 inches nominal, in cross section.
(b) The distance between the tops of the steps of a ladder shall not exceed 14 inches and shall not vary more than 1 inch in any one ladderway.
(c) Ladders shall be constructed so there is at least 10 inches clear space between the side rails.
(d) Ladder steps shall be securely fastened to the side rails with nails or other equivalent fastenings, and shall be secured against pulling loose by one or more of the following methods:
(1) Mortised in the side rails so as to be flush with the surface, provided this is done without unduly weakening the side rails.
(2) Fastened to the surface of the side rails with filler pieces between the ends of the steps. Filler pieces shall be the same width as the side rail and the same thickness as the ladder steps.
(3) Fastened on the surface of the side rails with continuous wooden strips nailed over the ends of the steps for the full length of the ladder.
(4) Any combination of the above methods which in the opinion of the Division will provide equivalent protection.
(e) Nails and other metal fasteners used in ladders that are exposed to corrosive water or corrosive mine atmosphere shall be made of metal that is resistant to corrosion of the type to which they are exposed.




s 7042. (11-3). Construction of Metal Ladders for Underground Use.
(a) Metal ladders shall be substantially constructed. Side rails shall have at least equal strength as that of No. 1 Select Douglas Fir, 2 inches by 4 inches in cross section.
(b) Steps shall be secured to the side rails in such manner as to prevent them from coming loose.
(c) Round ladder steps shall be at least 1-inch outside diameter. The steps of metal ladders shall be smooth and free of ribs or projections.
(d) The distance between the tops of the steps of a ladder shall not exceed 14 inches and shall not vary more than 1 inch in any one ladderway.
(e) Ladders shall be constructed so there is at least 10 inches clear space between the side rails.
(f) Metal ladders and ladder fasteners for use where exposed to corrosive waters or corrosive mine atmosphere shall be constructed of materials that are resistant to corrosion of the type to which they are exposed.




s 7043. (11-3). Construction of Flexible Ladders for Underground Use.
(a) Flexible ladders shall have sides made of chain, connecting links, wire rope, or fiber rope.
(b) Each side of a flexible ladder shall have a tensile strength not less than that of 1-inch best Manila rope. If chair is used, the links shall be made of stock not less than three-eighths inch.
(c) There shall be at least 12 inches of clear space between the sides of a flexible ladder.
(d) Each step of a flexible ladder shall be made of stiff material and shall be strong enough to safely support a weight of 300 pounds at the center of the step. The distance between the tops of the steps of a ladder shall not exceed 14 inches.
(e) The steps shall be fastened to the sides in such manner that they will be held securely in place without damage to the sides of the ladder.




s 7044. (11-1). Manways and Ladder Installations.
(a) Every mine shall have at least one means of outlet for the miners by means of ladders, stairways, or runway from all active workings of the mine to the surface.
(b) (11-55) No ladder or stair need be provided in a passageway if the slope is less than 20 degrees from the horizontal and the footing is such that men can walk safely.
(c) Every ladderway having an inclination of more than 60 degrees from the horizontal, and where the distance between the top and bottom of the ladderway is more than 30 feet, shall have substantial platforms at intervals of not more than 20 feet. If possible, the sections of the ladders shall be staggered at each platform so that no section shall be directly in line with the section above or below it.
(d) The ladder opening in any platform shall be large enough to permit ready passage of rescue men wearing breathing apparatus, and in no case shall such opening be less than 24 inches by 24 inches.
(e) Distance from the step to the nearest permanent object on the climbing side of the ladder shall not be less than 24 inches.
There shall be a clear width of at least 12 inches from the center line of the ladder on each side across the front of the ladder.
(f) (11-5) The front side of the step of a ladder shall in no case be less than 4 inches from any obstruction.
(g) (11-6) Ladders shall project at least 3 feet above every platform in the ladderway, and at least 3 feet above the collar of the shaft, winze, or raise, unless convenient and secure handholds are fixed at such places.
(h) (11-5) All ladders shall be securely fastened.
(i) Under no circumstances shall any ladder be installed in such manner that it leans backwards from the vertical.
(j) In all shafts which are in the process of sinking or enlarging, a fixed ladder, stair, or ramp shall be provided to within such distance from the bottom of the shaft as will secure it from the danger of blasting.
Access shall be provided from the bottom of the shaft to the bottom of the fixed ladder, stair, or ramp. Such access may be by means of an extension ladder or flexible ladder or by a handline or chain.
(k) Ladders, stairways, and ramps shall be installed at such distance from power and light wires that a person on them cannot accidentally contact an electric conductor.
( l) Every shaft shall be provided with a continuous means of egress from the bottom of such shaft to the nearest active mine level. Such means of egress may be by stairs or fixed ladders or ramps, or by a combination of the above.
(m) (11-3) Any manway through which employees are required or permitted to pass shall be kept in good repair to allow ready passage.
(n) (11-36) Trap doors or adequate guarding shall be provided in ladderways at each level. Doors shall be kept operable so that they are easily opened.




s 7046. Travelways.
(a) Where practicable, walkways shall be separate and apart from railway or vehicle roads.
(b) Walkways shall be kept free from stumbling hazards.
(c) Handrail, cable guard, fence, or other suitable barrier shall be installed along permanent walkways where there is danger of falling into excavations.
(d) (11-1) (11-16) Safe means of access shall be provided and maintained to all working places as required by the General Industry Safety Orders.
(e) (11-12) Openings above, below, or near travelways through which men or materials may fall shall be protected by railings, barriers, or covers. Where it is impractical to install such protective devices, adequate warning signals shall be installed.
(f) (11-2) (11-16) (11-36) Unless otherwise stated in the Mine Safety Orders, crossovers, walkways, ramps, stairways, railings, and toeboards shall be constructed, installed, and maintained in conformance with the General Industry Safety Orders.




s 7048. (11-27). Scaffolds.
(a) Scaffolds and working platforms shall be of substantial construction and provided with guardrails and maintained in good condition. Floor boards shall be laid properly and the scaffolds and working platform shall not be overloaded. Working platforms shall be provided with toeboards when necessary. Scaffolds shall be in conformance with the Construction Safety Orders.




s 7050. (9-107). Stopes.
(a) Floors shall be provided in every stope where needed for the safety of employees.
(b) In stopes timbered with square sets those portions of the working floors that are in use shall be closely and securely lagged.
(c) An adequate work floor shall be provided in narrow stopes that are too steep to permit safe footing.




s 7051. (11-12). Winzes, Raises, and Openings.
(a) Winzes or other openings in the floor of mine workings shall be guarded so that persons will not fall into them.
(b) (11-12) Manways intersecting overhead workings through which material is dropped shall be closed to the passage of persons whenever material is dropped through such working.
(c) (11-1) Every raise while under construction shall be provided with a safe means of access from the bottom to the face at all times when employees are working in the raise.
Such means of access shall be as follows:
(1) For slopes up to 20 degrees, a walkway may be used where there is safe footing.
If footing is slipping or otherwise insecure, a rope, chain, or other aid to climbing shall be provided.
(2) For slopes from 20 degrees to 45 degrees, chains, or ladders shall be provided.
(3) For slopes greater than 45 degrees, ladders shall be provided.
(4) Other means that will afford at least equal safety.




s 7052. (9-103). Chutes and Ore Passes.
(a) Chutes and ore passes shall be guarded.
(b) Employees shall be protected against falling into the chute by one or more of the following methods:
(1) A grizzly with openings between the bars of not more than 10 inches in the least dimension.
(2) Use of an approved safety belt and life line tied sufficiently short to prevent the wearer from going through the grizzly opening where such opening is greater than 10 inches in the least dimension. In no case shall grizzly bars be more than 30 inches apart.
(3) By other equally safe means acceptable to the Division.
(c) Active chutes and ore passes shall be kept in good repair so that material will not spill into a manway.
(d) Chute gates shall be maintained in safe and easily operable condition.
(e) To protect the hands and arms of trammers and train crews, a safe clearance of not less than 6 inches shall be maintained between any part of a chute and the top of every car that is operated under such chute.
(f) (9-106) Ample warning shall be given to men who may be affected by the draw or otherwise exposed to danger from chute-pulling operations.
(g) (9-107) Men shall not stand on broken rock or ore over draw points if there is danger that the chute will be pulled. Suitable platforms or safety lines shall be provided when work must be done in such areas.




s 7055. Fire Prevention and Control.
(a) No person shall smoke or use an open flame:
(1) (4-1a) Where flammable solvents, liquids, fluids, or other flammable materials are stored, transported, handled, or used; or
(2) (4-1b) Where oil or grease is stored, transported, handled, or used, if smoking or the use of an open flame may cause a fire; or
(3) (4-1c) Within an unsafe distance of any area where smoking or the use of an open flame may cause a fire or an explosion.
(b) (4-2) Signs warning against smoking and open flames shall be posted so they can be readily seen in areas or places where fire or explosion hazards exist.
(c) (4-4) Flammable liquids shall be stored in accordance with standards of the National Fire Protection Association or other recognized agencies approved by the Bureau of Mines. Small quantities of flammable liquids drawn from storage shall be kept in appropriately labeled safety cans.
(d) (4-8) Fuel lines shall be equipped with valves to cut off fuel at the source and shall be located and maintained to minimize fire hazards.
(e) (4-9) All heat sources, including lighting equipment, capable of producing combustion shall be insulated or isolated from combustible materials.
(f) (4-14) Solvents with flash points lower than 100 Fahrenheit (38 Centigrade) shall not be used for cleaning.
(g) (4-15) Solvents shall not be used near an open flame or other ignition source, or near any source of heat, or in an atmosphere that can elevate the temperature of the solvent above the flash point.
(h) (4-20) Battery-charging stations shall be located in well-ventilated areas.
(i) (4-21) Equipment powered by internal combustion engines (except diesel engines) where the fuel tank is an integral part of the equipment, shall be shut off and stopped before being fueled.
(j) (4-22) Each mine shall have available or be provided with suitable fire-fighting equipment adequate for the size of the mine.
(k) (4-23) Firefighting equipment which is provided on the mine property shall be strategically located, readily accessible, plainly marked, properly maintained, and inspected periodically. Records shall be kept of such inspections.
( l) (4-29) When welding or cutting near combustible materials, suitable precaution shall be taken to ensure that smoldering metal or sparks do not result in fire.
(m) (4-33) Valves on oxygen and acetylene tanks shall be kept closed when the contents are not being used.
(n) (4-40) Fire alarm systems shall be provided and maintained in operating condition or adequate fire alarm procedures shall be established to warn promptly all persons endangered by a fire.
(o) (18-12) Emergency telephone numbers shall be posted at appropriate telephones.
(p) (4-19) Gauges and regulators used with oxygen or acetylene cylinders shall be kept clean and free of oil and grease.




s 7056. Surface Structures over or Near Mines.
The provisions of T8-7056 of Part 6, T-24, are incorporated herein as a part of these regulations and reads as follows:
UNDERGROUND

T8-7056. Surface Structures Over or Near Mine Openings.
In addition to the provisions of Part 2, the following shall apply to all mine construction.
(a) Change houses, timber framing sheds, storage sheds, or piles of combustible materials shall not be placed or permitted to remainwithin 100 feet of any mine opening, shaft house, hoist house, explosives magazine, or ventilating fan.
(b) Every building and structure within 100 feet of any mine opening shall be constructed of noncombustible materials or shall be of not less than one-hour fire-resistive construction,except that wooden headframes and headframes with built-in wooden bins for dumping the shaft conveyance may be erected and used over mine shafts.
(c) A fire door shall be installed at the collar of every shaft over which a wooden headframe has been erected.
(d) A fire door shall be installed at every mine opening connected to a surface building or snowshed. Such fire door shall be installed as near to the surface as is practical, and shall be so arranged that it will close automatically in case of fire.
(e) At all times when men are working in a mine and combustible structures are within 100 feet of a mine opening, a man shall be on duty outside the mine and near the mine opening.




s 7057. Mine Exit Protection.
(a) Each mine required to maintain an escape exit shall protect underground employees against the hazard of all exits becoming impassable because of fire or fire gases by one or more of the following methods:
(1) By fireproofing the main shaft and shaft stations where there is a fire hazard sufficient to interrupt use of the main shaft hoist for rescue purposes.

(2) By maintaining a connecting passageway between working levels of such mine and an adjoining mine which has a safe access to the surface.
(3) By mechanical control of the air currents that will permit good air to be supplied through any shaft or escapeway by reversal of air currents.
(4) By installation of fire doors and ventilation doors satisfactory to the Division.
(5) If none of the foregoing methods can be made applicable to a particular mine, such mine may be required by the Division to install a hoist in an escape exit and keep it in a usable condition.




s 7058. Fire Doors and Fire Bulkheads.
(a) If the Division considers that a serious fire hazard exists at a mine, fire doors or fire bulkheads shall be installed so as to prevent smoke and gases from endangering the men. Such doors may also be used for mine ventilation.
(b) Fire doors shall be constructed of steel and shall be set in steel or concrete walls so constructed that fire on one side cannot pass to the other side when the door is closed.
(c) Fire doors shall fit closely so they can be readily made gas tight when closed. They shall be provided with suitable latches or devices so they can be readily opened from either side without the use of tools, but cannot be opened by a reversal of the air current.
(d) Fire doors shall be tested each month and maintained in good working order.
(e) Where practical, fire bulkheads shall be installed in solid rock away from timbers and stoped-out areas. Fire bulkheads shall be of noncombustible construction if located within 100 feet of mine timbers or other combustible materials.
(f) Fire bulkheads shall be installed in such manner that fire, smoke, and gases on one side of the bulkhead cannot pass to the other side.
Note: In order to provide for sampling air or gas behind the bulkhead, in case fire or other emergency makes such sampling desirable, it is recommended that a metal pipe be installed through the bulkhead. Such pipe should be not less than 1-inch inside diameter and provided with a cap or gate-type valve on the outer end.




s 7060. Fire Prevention -Underground.
(a) (4-9) All electrical equipment which might communicate fire to adjacent flammable material shall be of a type which will confine the heat and flames within the equipment, or it shall be so located and installed that flammable material will not be exposed.
(b) If the Division considers that a serious fire hazard exists at mine openings or underground stations, it may require that underground employees be protected by one or more of the following methods:
(1) By making fire resistant the mine openings for a distance of 50 feet from the surface.
(2) By making fire resistant underground stations and adjoining portions of the shaft.
(3) By making fire resistant underground buildings or enclosures used to house machinery, or as lunchrooms or places of assembly for men.
It is recommended that the main shafts and haulageways be provided with fireproof sections at regular intervals.
(c) In mines where serious fire hazards exist, the division may require fire inspection of timbered areas after the crews have left the working places at the end of the shift.




s 7061. Heating Devices Underground.
(a) (4-58) Fire for space heating shall not be permitted underground. Torches, acetylene lamps, and candles shall not be left unattended in any mine in the vicinity of wood or other flammable material.
(b) Electric heaters underground shall be of a type in which the heating elements do not become hot enough to ignite combustible materials.
(c) Acetylene taken underground shall be in cylinders and shall be limited to necessary quantities. It shall be stored in a well-ventilated, fire-resistant location.
Empty cylinders shall be removed from the mine without unnecessary delay.
(d) (4-65) The following precautions shall be taken when welding equipment, blow torches, or other heat-producing devices or materials are used in a mine:
(1) All flammable materials within a radius of 10 feet shall be made wet with water before hot work is begun and again after hot work is finished.
(2) Any flammable materials at a greater distance than 10 feet upon which sparks or hot metal can fall shall be made wet with water before hot work is begun and again after hot work is finished.
(3) Before hot work is commenced in a shaft, a noncombustible barrier shall be installed to prevent sparks from falling below.
(4) A fire extinguisher or water hose ready for use shall be at the operation until the hot work is finished.

(5) The area where hot work was done shall be inspected for smoldering fires between one and two hours after hot work is finished.




s 7062. Mine Housekeeping.
(a) Combustible rubbish shall be promptly removed from the mine.
(b) All oily rags or waste shall be deposited in covered metal receptacles. The contents shall be sent to the surface every week, and also when the receptacle is full.
(c) Old timber, waste timber, scraps, and chips shall not be permitted to accumulate underground, but shall be removed from the mine as soon as practical.
Exception: Old timber, waste timber, wood scraps, and chips in stopes may be left in the mine if buried in filling material.
(d) Active manways, shafts, and winzes shall be kept clear of loose rocks and other obstructions.




s 7063. (4-22). Fire Fighting Equipment.
(a) One or more fire extinguishers of a type suitable for use underground shall be provided at all locations where electrical equipment is in service in the mine.
Carbon tetrachloride fire extinguishers shall not be permitted in a mine because of danger to men who may breathe the vapor.
(b) Where a fire hazard exists near an underground magazine or an explosives distributing station, fire extinguishers or water hydrants and hose shall be provided for use in fighting fire outside the magazine. They shall not be used on burning explosives nor in fighting a fire in a magazine.
(c) Fire extinguishers of a type suitable for use on oil fires shall be at every storage place for oil or grease in the mine.
(d) Every mine with a fire hazard as outlined below shall be protected against fire in accordance with the provisions of subsection (e) of this section:
(1) Mines in which the main working shaft is timbered and such timber is not protected against fire by being made fire resistant or by being constantly wet.
(2) Mines in which stations are in a combustible condition.
(3) Mines with workings considered by the Division to constitute a local fire hazard of more than normal proportions.
(e) Mines required by subsection (d) of this section to be protected against fire shall be provided with water and equipment for fighting fires as follows:
(1) A supply of water so distributed that a stream of water can be made readily available at any mine station at which a fire hazard exists and throughout all combustible portions of the shaft. "Readily available" means that all necessary piping, valves, and hose connections must be in place and a supply of hose sufficient for the need kept conveniently near such hose connections. Attention is called to the advisability of having connections for hose so placed that a stream of water can be directed upon any station from above and below the station in the event of a fire at the station.
(2) Hose shall be kept at the mine entrances, on each working level, and at such other places as may be required by the Division.
(3) The threads and couplings for hose for fighting fire shall be of standard sizes so that hose coupling of a given size may be readily connected to a pipe coupling of like size.
(4) Fire pails and a 50-gallon drum or tank of water shall be located in every section of the mine where timber is framed and where other fire fighting equipment is not available.

(5) Where the water supply is inadequate or cannot be practicably applied, special fire fighting equipment and protection may be required by the Division.
(6) All equipment intended solely for fire fighting purposes shall be tested or carefully inspected at monthly intervals and defective equipment repaired or replaced immediately. All hand chemical fire extinguishers of the soda-acid type shall be discharged, inspected, and refilled every 12 months, and the date of last refilling marked on a tag attached to the extinguisher. Special care must be taken to keep the nozzles of chemical fire extinguishers free from corrosion. See Subchapter 3, Title 19, CAC for additional servicing requirements.
(7) Special provision shall be made to protect fire extinguishers whose effectiveness is destroyed by cold.
(8) The location of each fire extinguisher shall be marked conspicuously so that it may be easily found in an emergency.




s 7064. (4-46). Combustible Liquids and Gases -Surface Storage.
(a) Combustible liquids and gases shall be stored at least 100 feet from the following:
(1) Mine openings
(2) Buildings and snow sheds connected to mine openings

(3) Ventilation fan houses
(4) Hoist houses
(5) Explosive magazines
The storage place shall be located where contents of leaking containers cannot run over the surface to any point within 100 feet of the above-mentioned places and structures.
Note: Certain petroleum gases, such as butane and propane, are compressed to liquid form in pressure tanks. When a tank containing liquefied petroleum gases leaks or is ruptured, the contents vaporize in the atmosphere. These vapors are heavier than air and will flow downhill over the surface of the ground much like water until the vapors are diffused. For this reason tanks containing liquefied petroleum gases must be stored at locations which are in compliance with the provisions of this section.




s 7065. (4-54). Fuels, Lubricants, and Rope Dressings -Underground Storage and Handling.
(a) Oils, greases, and rope dressings taken underground shall be transported and stored in closed metal containers that will not permit the contents to leak or spill.
(b) Rope dressings shall not be stored in the mine.
(c) The underground storage place for oils and greases shall be located in a remote place where there will be the least danger to men in the mine should a fire occur.
Where practical, the storage place shall be at least 25 feet from any timbers. Where it is necessary to store oils or greases nearer than this distance to mine timbers, such timbers shall be made fire resistant.
Should the amount of oil or grease stored on any 1 level exceed 60 gallons, it shall be stored in a manner acceptable to the Division.
(d) The storage place shall be so arranged that the contents of leaking containers cannot run from the storage place.
(e) Adequate drip pans shall be provided at the storage places of oils, greases, and rope dressings.
(f) Leaking containers or fittings shall be promptly repaired or replaced.
(g) Spillage and leakage shall be promptly cleaned up and sent to the surface.
(h) No combustible materials shall be permitted in any oil or grease storage place.
(i) (4-52) Gasoline shall not be taken, stored, or used under -ground except in permissible flame safety lamps.
(j) (4-53) The use of liquified petroleum gases shall be limited to maintenance work.




s 7068. Internal-Combustion Engines Near Mine Openings.
No internal-combustion engine shall be permitted on the surface within 50 feet of any mine opening.
Exception: This does not apply to self-propelled vehicles which are not operated as stationary equipment.




s 7069. Engines Prohibited Underground.
No fuel-burning or internal-combustion engine, other than diesels as allowed in Section 7070 of these Orders, shall be permitted to operate in any mine.





s 7070. Permit to Use Diesel Engines Underground.
(a) No diesel engine shall be permitted in an underground mine unless a permit to use diesel engines underground has first been secured from the Division of Industrial Safety.
(b) Application for such permit shall be made in writing to the Division of Industrial Safety, and shall include the following information:

(1) Service for which diesel engines are intended.
(2) Location in mine where engines are to be operated.
(3) Aggregate brake horsepower of all diesel engines to be operated in the mine.
(4) Plans for ventilation of the mine.
(5) Any other information considered pertinent by the Division.
(c) When in the opinion of the Division diesel engines can be operated safely in the mine, a permit may be issued to the applicants specifying the conditions under which the diesel engines must be operated.
(d) When a permit is issued the conditions specified are those believed necessary for the protection of workers. If experience in the operation of the diesel engine indicates that any of the conditions are inadequate or unnecessary, the Division may revise the conditions in the light of such experience.
(e) The permit to use diesel engines underground may be revoked for failure to comply with conditions of the permit.
(f) The following is a list of conditions under which diesel powered equipment will be permitted to operate in underground mines:
(1) Before any diesel engine is permitted underground, the employer shall make sure that it is in good operating condition.
(2) Every diesel engine, which is operated underground, shall be checked daily by a mechanic who is skilled in the operation and maintenance of diesel engines. The diesels shall be maintained in good operating condition.
(3) The exhaust of each diesel shall be passed through a water bath or approved catalytic conditioner prior to its discharge into the atmosphere. Conditioners shall be kept in proper operating condition at all times when equipment is in use underground.
(4) Diesel exhaust gas shall not be directed towards diesel operators and shall be deflected so that persons alongside will not encounter exhaust gas at breathing level.
(5) The diesel fuel shall not contain in excess of .5% of sulphur.
(6) Each diesel unit shall be equipped with a fire extinguisher suitable for control of oil fires.
(7) Before any diesel engine is permitted underground, the mine shall be provided with a mechanically produced and positively controlled system of ventilation.
(8) The main fan shall be installed on the surface and shall be of a type that readily permits the air current to be reversed in direction.
(9) A continuous flow of fresh air shall be maintained in the mine as long as any diesel equipment is operating therein.
(10) The flow of fresh air in any air course shall never be less than 100 cubic feet of air per minute per brake horsepower of the aggregate diesel equipment operating in such air course, plus 200 cubic feet of air per minute for each employee therein.

(11) Positive instructions shall be issued to all workmen that all diesel equipment underground shall be shut down immediately should the air flow stop, and shall remain shut down until the air flow is resumed.
(12) A daily record shall be kept of the condition of the diesels and the amount of ventilation provided. The record shall show:
(A) Condition of each diesel engine
(B) Total horsepower of diesel equipment that operates in the mine
(C) Quantity of air flowing in the air course
(D) Locations at which the air measurements were taken in relation to position of the diesel engines
(E) Name and title of the person who made the measurements
(13) The record shall be signed by the person who made the measurements. A signed copy shall be kept in the office at the mine, and this copy shall be available for inspection by engineers of the Division of Industrial Safety.
(14) Daily air quality tests shall be conducted for nitrogen dioxide and carbon monoxide. Results of such tests shall be kept with the daily diesel engine records. Diesels shall be shut down or ventilation increased if contaminant levels exceed safe threshold limit values.






s 7071. Fueling Diesel Engines Underground.
(a) Diesel engines shall not be fueled underground where it is practical to fuel them on the surface.
(b) When fueled underground the engine shall be taken to the fuel storage place, if practical, and the fuel pumped directly from the storage container to the engine fuel tank.
(c) (4-54) When the engine must be fueled away from the fuel storage place, the fuel shall be transported in closed metal containers that will not permit the contents to leak or spill should the container be overturned.
(d) The engine shall be shut down during fueling operations.
(e) Precautions shall be taken to prevent spilling during fueling operations. Spilled fuel shall be promptly cleaned up and removed.
(f) The use of compressed air to force fuel from a container is prohibited.
(g) (4-1) No fire, smoking, open lights, or other source of ignition shall be permitted near fueling operations.
Note: See Section 7065 for orders pertaining to storage of fuels and lubricants.




s 7074. (4-50). Emergency Plan.
(a) The operator of every mine which employs men underground or is required by these Orders to provide an escape exit shall prepare a general plan of action for use in time of emergency.
(b) The plan shall outline the duties and responsibilities of each mine official and key man so that each will know what is expected of him should a fire, explosion, or other emergency occur.
(c) The plan shall be posted conspicuously on the mine safety bulletin board and in the mine office.
(d) All officials and key men shall be thoroughly instructed in their duties so as to avoid contradictory orders and confusion at a time when promptly and efficient action is needed.
(e) Workmen, both surface and underground, shall be informed of the plan, and each man shall be told what is expected of him in case of explosion, fire, or other emergency.




s 7075. (4-51). Emergency Alarm System.
(a) An emergency alarm system adequate to give warning to all employees underground shall be installed and maintained in good working order at all mines.
(b) Where compressed air is available at all times that an employee is in the mine, it is recommended that a stench method of warning be used. Where compressed air is not available, some other warning system acceptable to the Division shall be used. (continued)