805 KAR 2:010. Underground coal mine usage

Link to law: http://www.lrc.ky.gov/kar/805/002/010.htm
Published: 2015

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      805 KAR 2:010.

Underground coal mine usage.





KRS 352.050(1), 351.070(13)


AND CONFORMITY: This administrative regulation is to permit the use of diesel

powered equipment in underground mines for the purpose of reducing the number

of electrocutions and mine fires from electrical cables.


      Section 1. General

Requirements for the Use of Diesel Equipment. (1) Only diesel equipment bearing

approval plates of permissibility issued by the Federal Mining Enforcement and

Safety Administration and approved for use by the Kentucky Department for

Natural Resources will be allowed in underground coal mines of the State. No

diesel powered machinery may be taken into any underground coal mine of the State

of Kentucky without the written approval of the Commissioner of Mines and

Minerals. The approval for use shall incorporate all the requirements of these

administrative regulations. If at any time the commissioner determines that any

condition or practice permitted under this approval may threaten the health or

safety of the employees, he may impose additional requirements for the purpose

of eliminating the condition or practice.

      (2) If technical,

scientific or engineering information is gained indicating that approved diesel

machinery may be used in a manner which will afford workmen equal or greater

protection than afforded by the provisions of these administrative regulations,

the commissioner may approve the use of the machinery in the manner which provides

equal or greater protection.

      (3) Mining

Enforcement and Safety Administration approval of the permissibility of mobile

diesel powered transportation equipment (hereinafter referred to as diesel

machine(s)) means only that the particular machine has met certain specific

requirements of design and performance, but such approval does not guarantee

that it is impossible to use a permissible machine in an unsafe manner. The

manufacturer must develop equipment that will meet the particular requirements

for approval, but it is the user's responsibility to see that the equipment is

maintained in permissible condition and is used in a permissible manner. In

addition to proper maintenance, the use of diesel machines underground involves

certain other factors, such as ventilation, which are of equal importance in

establishing safe operating conditions. It is absolutely essential to observe

the requirements of these administrative regulations in operating and

maintaining such machines to avoid impairing their permissible status and thus

defeat the protective features that are necessary for their safe use.

      (4) Engine

adjustments shall be verified by the manufacturer as being correct before each

permissible diesel machine is operated in a coal mine.

      (5) Alteration in

design, substitution of components or subassemblies, or changes in conditions

of operating permissible diesel machines shall not be made without prior

concurrence of the Kentucky Department for Natural Resources and the Mining

Enforcement and Safety Administration. When such changes are permitted additional

engine tests and adjustments shall be required as necessary to ensure the safe

operation of the particular machine in a coal mine.


      Section 2. Proper

Ventilation to be Maintained for the Mines in Which Diesel Powered Equipment is

Used. (1) The use of diesel machines underground shall be restricted to

haulageways and working places where positive (controlled flow) ventilation is


      (2) The ventilating

air in all mine workings where diesel machines are operated shall not contain

combustible or other contaminating gases in such concentration that will affect

combustion in the diesel engine by materially increasing production of toxic

(poisonous) or other objectionable constituents in the engine exhaust.

      (3) Each set of

producing entries in which diesel powered equipment is used shall be placed on

a separate split of air.


      Section 3. In mines

using diesel powered equipment the quantity of ventilating air must meet the

following standards:

      (1) In addition to

the amount of air required by the Kentucky Mining Law, at least 6,000 cubic

feet of air per minute shall be provided for each diesel unit used in a working

section of a mine. The air measurement shall be taken in the last open entry

crosscut. If these locations cannot be used due to pillaring, the measurements

shall be taken at the intake and return of the section. The quantity of

ventilating air shall be adequate to dilute the toxic and/or objectionable

constituents of the engine exhaust so that the composition of the air in each

haulageway and working place connected thereto will meet authoritative

standards for safe healthful working environment.

      (2) The minimum

quantity of ventilating air that must be supplied for a permissible diesel machine

in a given time shall conform to that shown on the approval plate attached to

the particular machine.

      (3) The quantity of

ventilating air in mine workings where diesel machines are operated shall be

measured once during each working shift and a record of each measurement shall

be kept in a book provided for this purpose.

      (4) No person shall

incorporate any device in the exhaust system of a permissible diesel machine

that has not been approved in the tests that determine the permissibility of

the machine.


      Section 4.

Maintaining Proper Quality Air in Mines that Use Diesel Powered Equipment. (1)

The air supplied for ventilation where diesel machines are used in coal mines

shall contain not less than twenty and five-tenths (20.5) percent, by volume,

of oxygen (dry basis) and not more than one (1.00) percent, by volume, of


      (2) The ventilating

air in working places where diesel machines are operated shall be sampled and

analyzed chemically often enough to assure that the composition of the engine

intake air conforms with requirements stated in subsection (1) of this section

and that the concentrations of contaminants, such as carbon dioxide, carbon

monoxide, and oxides of nitrogen, when added to the ventilating air by the

diesel-engine exhaust shall meet authoritative standards for safe healthful

working environment.

      (3) Ventilation and

machine-operating conditions shall maintain the composition of the air in the

pertinent mine workings so that the tolerable limits stated in subsections (1)

and (2) of this section will not be exceeded.

      (4) Diesel-engine

exhaust shall not contain black smoke.

      (5) When the

conditions of the quality of air stated in subsections (1), (2), and (3) of

this section are not maintained, as determined by analysis or other observation

operation of diesel machines shall be stopped until the requirements of air

quality are complied with.

      (6) Records shall be

kept of all air analyses and of any changes(s) in ventilation or diesel engine

adjustment resulting from the analyses.


      Section 5.

Maintenance of diesel machines to be maintained according to the following


      (1) The maintenance

of diesel machines in permissible condition shall be delegated only to

authorized, competent persons.

      (2) Engine intake

and exhaust systems shall be inspected visually at least once each working

shift. Other diesel machine components shall be inspected in accordance with

instructions of the manufacturer. Records shall be kept of the inspections.

      (3) Maintenance,

inspection and repair work shall be done in accordance with instructions of the

manufacturer. Records shall be kept of maintenance, inspection and repair work.


      Section 6. The

Maintenance of the Engine-fuel-injection System. (1) Injection values.

      (a) Injection values

shall be maintained in proper operating condition. Particular attention shall

be given to preventing imperfect atomization or distribution of the fuel.

      (b) Replacements of

worn or broken injection valves shall be identical with those on the engine

when the diesel machine was approved as permissible.

      (2) Fuel pump.

      (a) The engine fuel

pump shall be sealed or locked to prevent tampering. The seal shall be broken

only by an authorized competent person, when necessary to reset the fuel pump,

after which the pump shall be resealed.

      (b) Resetting of the

stop limiting maximum fuel injection of the fuel pump shall be identical with

the original setting provided by the manufacturer.

      (c) Each shop or

facility in which diesel engines are serviced shall be provided with equipment

for properly measuring the quantity of fuel delivered by the fuel pump when

operating at maximum fuel setting, or such adjustments shall be made only by a

competent diesel service organization where such equipment is available.

      (d) The fuel pump

shall be set to deliver the maximum weight of fuel specified in the

certifications provided by the Mining Enforcement and Safety Administration and

the Kentucky Department for Natural Resources.

      (e) When operating a

diesel engine at altitudes exceeding 1,000 feet above sea level, the maximum

quantity of fuel injected by the fuel pump shall be set in accordance with the

liquid fuel rate-altitude table provided in the manufacturer's caution



      Section 7. The

Procedures to Follow in Inspection and Maintenance of Engine-intake System. (1)

The engine-intake system including flame arrester(s), air cleaner, and all

joints shall be inspected at intervals according to the manufacturer's general

maintenance instructions.

      (2) Inspection of

the engine-intake system shall include tightness of all joints and cleanliness

of flame-arrester surfaces.

      (3) Periodic

measurements shall be made of the vacuum in the engine-intake system to

determine whether the air cleaner and flame arrester(s) require cleaning.

      (4) The air cleaner

of the engine-intake system shall be maintained in accordance with the

manufacturer's instructions. The normal oil-filling level shall not be



      Section 8. When and

How to Inspect and Maintain the Engine-exhaust System. (1) The engine-exhaust

system, including flame arrester(s), conditioner or cooling boxes, shutoff

mechanism, water spray, and exhaust-dilution system shall be inspected at

intervals according to the manufacturer's general maintenance instructions.

      (2) Periodic

measurements shall be made of the positive pressure in the engine-exhaust

system to determine whether the exhaust flame arrester requires cleaning.

      (3) The water supply

for the exhaust-gas cooling system shall be replenished by an authorized person

at the beginning of each working shift.

      (4) When salts from

the evaporation of water in the exhaust-gas cooling system are deposited on

auxiliaries, such as cooling boxes, conditioners and other parts of the system,

such auxiliaries shall be flushed with water and cleaned to remove the salt

deposits, as well as soot filtered from the exhaust gas.

      (5) Float valves

shall be serviced at intervals according to the manufacturer's instructions to

maintain them in good operating condition.

      (6) Functioning of

the fuel shutoff mechanism actuated by the exhaust-gas temperature, shall be

tested at least once every three (3) months. This test shall be made in a safe

place; not in active face workings of a coal mine.

      (7) All heated

surfaces of the diesel engine shall be inspected and cleaned at intervals

frequent enough to ensure that such surfaces are kept free of combustible

materials, such as coal dust, diesel fuel, lubricants, and rags or waste.

      (8) The exhaust-gas

dilution system shall be inspected and cleaned at intervals frequent enough to

ensure safe dilution of the exhaust gas when it is discharged from the diesel


      (9) Whenever the

diesel-engine exhaust is smoky or objectionable odors are emitted in the

exhaust, the cause shall be investigated immediately and corrected in

accordance with the manufacturer's instruction.


      Section 9. The Use

and Maintenance of Electrical Components of Diesel Equipment. (1) Locks and

seals. Electrical parts, such as battery boxes and headlights, shall be

provided with locks and seals that are maintained where required to preserve

the permissible status of a permissible diesel machine.

      (2) Fastenings.

Joints in motor casings, starting switch enclosures, headlights, and other

parts that are subject to arcing during normal operation shall be fastened

securely. All bolts, cap screws, and other means of joining parts of casings

and enclosures shall be kept in their proper places and secured tightly.

      (3) Wiring and


      (a) Wiring

insulation shall be maintained in good condition and when worn or abraded shall

be replaced with well-insulated wiring.

      (b) Rubber hose,

steel pipe, and other types of conduit for wiring shall be supported firmly at

each end and between ends when the lengths are such as to require additional

support. Conduit and other means of protecting wiring shall be kept in place

and maintained in condition equivalent to that provided by the manufacturer for

the permissibility tests.

      (4) Headlight and

instrument lenses. Lenses forming part of the explosion-proof casings of headlights

or enclosures of instruments shall be held securely in place. Cracked lenses

shall be replaced immediately.

      (5) Overload and

short-circuit protection. Tampering with fuses, relays or other means supplied

by the manufacturer for overload and short-circuit protection of wiring and

electrical parts shall not be permitted, nor shall the use of substitutes that

nullify such protection be permitted.

      (6) Battery. Battery-cell tops shall be maintained free of electrolyte and other foreign

material. Connections between battery cells shall be kept tight and free of



      Section 10. Fuel

Usage in Diesel Powered Equipment. (1) Specifications.

      (a) The fuel for

diesel engines of machines approved for service in underground mines shall

conform to the equipment manufacturer's specifications for viscosity, pour

point, cetane number, carbon residue and water. The flash point shall be not

less than 140 degrees Fahrenheit, and the sulphur contents shall not exceed

five-tenths (0.5) percent by weight.

      (b) Only distillate

fuel shall be used in engines of permissible diesel-powered transportation

equipment for underground mines.

      (2) Storage and


      (a) Fuel taken

underground shall be transported only in strong, tight metal containers that

are provided with efficient closing devices.

      (b) The quantity of

fuel stored underground shall not exceed that required for twenty-four (24)

hour operation of all diesel machines in use.

      (c) Fuel taken

underground and awaiting transfer to diesel machine fuel tanks shall be stored

in a closed compartment, constructed of incombustible materials, and shall be

kept in a well-ventilated location, the return air from which shall not pass

through any active mine workings.

      (d) The walls of a

fuel-storage compartment shall form a liquid tight joint with the bottom of

mine floor. Any opening in the fuel-storage compartment, such as a doorway,

shall be provided with a sill high enough to form a catch-basin in the storage

compartment to retain spilled fuel. The capacity of the catch-basin shall be

large enough to hold the maximum quantity of fuel that is permitted to be

stored underground.

      (e) Diesel machine

fuel tanks shall be filled only at the fuel-storage compartment. Fuel shall be

transferred from the storage compartment to a machine fuel tank through

flexible hose that is fitted with a self-closing value.

      (f) The

fuel-handling system and the diesel machine shall be frame grounded when fuel

is being transferred from the storage compartment to the machine fuel tank.

      (g) The air vents on

fuel-handling equipment shall be flameproof.

      (h) When fuel is

being transferred from the storage compartment to the machine fuel tank, the

diesel engine shall be stopped.

      (i) A supply of sand

or other suitable incombustible material shall be available during the transfer

of fuel from the storage compartment to the machine fuel tank for absorbing

spilled fuel.

      (j) All drain plugs

in the fuel-handling system shall be threaded and sealed or locked in the

closed position to prevent unintentional opening.

      (k) Only trained

authorized persons shall be permitted to handle fuel for diesel machines.

      (l) In fuel-handling

operations, precautions shall be observed to keep the fuel clean and free from

contamination by foreign material, such as dirt, sediment and water.

      (m) Fuel filters on

diesel engines shall be cleaned regularly and repaired promptly as conditions



      Section 11. Types of

Fire Extinguishers Used and their Storage. Liquid carbon dioxide or pressurized

dry-chemical fire extinguishers shall be installed at underground repair shops,

machine barns, and fuel shortage compartments.


      Section 12.

Maintenance of Underground Repair Shops and Machine-storage Barns. (1)


      (a) Underground

repair shops and diesel machine-storage barns shall be ventilated by a separate

air split between the intake and return airways.

      (b) When diesel

machines are operated in underground repair shop or storage barn, or in the

event of fire, arrangements shall be made to conduct the products of combustion

therefrom directly to the return airway.

      (2) Construction.

      (a) Underground

repair shops and machine-storage barns shall be lined with nonabsorbent,

incombustible material. Doors to other means of closure shall be constructed of

similar incombustible material.

      (b) Floors of

underground repair shops and machine-storage barns shall be impervious to oil

and shall be so graded as to provide natural drainage to a sump or catch-basin

to collect spilled oil.

      (c) Spilled oil

shall be cleaned up and removed from the sump or catch-basin promptly and

stored in closed metal containers until disposed of on the surface.

      (3) Repair

operations. Welding or other operations that might create a fire hazard shall

not be done unless precautions are observed to prevent inadvertent ignition of

diesel fuel or lubricants.

      (4) Miscellaneous. A

supply of sand or other incombustible material shall be kept in underground

repair shops and machine-storage barns to aid in firefighting and to absorb

spilled diesel fuel or lubricants.


      Section 13. General

Conditions Governing the Operation of Diesel-powered Equipment in Underground

Mines. (1) The operation of diesel equipment in underground coal mines in Kentucky shall be under the supervision of a foreman holding a Kentucky Mine Foreman Certificate.

      (2) Not more than

two (2) diesel shuttle cars will be permitted to operate at the same time in a

single air split. Provided, however, that the Commissioner of Mines and

Minerals may if he determines that the safety or health of the employees will

not be jeopardized, permit additional shuttle cars to be used.

      (3) No diesel

equipment will be permitted to operate in any section of a mine where room

entries exceed 3,000 feet in depth.

      (4) The engine of a

shuttle car shall be shut down at all times when not in use (that is, it must

not be allowed to idle more than absolutely necessary).

      (5) If the engine

exhaust becomes more noticeable than normal, the equipment shall be removed

from the faces and shut down until the proper repairs can be made to correct

this condition.

      (6) All employees

working in sections where diesel equipment is used shall be furnished with

self-rescue respirators which they shall carry at all times while on duty in

the mine.

      (7) No person who

works in close proximity to mobile diesel equipment throughout the shift shall

be permitted to work more than a ten (10) hour continuous shift in any

twenty-four (24) hours.

      (8) Access to all

company records such as maintenance, repairs, fuels, ventilation, etc.,

pertaining to the use of the underground diesel equipment shall be made

available to representatives of the Kentucky Department for Natural Resources

upon request. The mine operator shall keep and make available other pertinent

records as prescribed by the Kentucky Department for Natural Resources.

      (9) The operation of

any diesel machine in any manner or under any condition that does not comply

with the requirements of these administrative regulations shall be considered

by the department as voiding its approval for underground use.

      (10) Terminology

used in these administrative regulations is consistent with that of KRS 351.010

and 352.010 unless the context requires otherwise. (CM-Rg-1-1.01-1.13; 1 Ky.R.

168; eff. 12-11-74; TAm eff. 8-9-2007.)