Program Policy Manual - VOLUME V - Mine Safety and Health ...

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MSHA PROGRAM POLICY MANUAL VOLUME V Where it is clear at a particular mine that self-propelled, track-mounted, or rubber-tired equipment that is used to transport miners is operating on grades so steep that the ratio of the gear train is not sufficient to prevent movement of the equipment when it is parked, inspectors should determine the operator's method of preventing accidental movement. It should be noted that devices which trap hydraulic fluid, such as the "MICO Leverlock," are sometimes being used as parking brakes. This type of device is not suitable for use as a parking brake because pressure may be lost due to fluid leakage or contraction when it cools, allowing the vehicle to move. If the operator does not use a reliable method of preventing accidental movement of parked equipment, then a notice to provide safeguard under this section should be issued. Generally, the notice should indicate that the operator shall take reliable precautions against accidental movement of the affected equipment when it is parked. Inspectors should allow operators flexibility in providing the necessary precautions, while at the same time making it clear what constitutes compliance with the safeguard notice. Many manufacturers of mining equipment now have available parking brake systems for personnel carriers. Where an inspector determines that a safeguard notice is necessary in order to address a transportation hazard, the specific safeguard requirements are to be determined by the inspector based on the actual, specific conditions or practices that constitute a transportation hazard at that particular mine. The inspector should document either in the notice or in the inspector's notes the conditions which provide the basis for the issuance of the safeguard notice. The safeguard notice should also identify the nature of the hazard to which it is directed. For example, if a notice to provide safeguards is issued to require a specific minimum clearance distance between pieces of haulage equipment, the safeguard should also include a statement of the hazards that the clearance distance is intended to prevent, such as injury to equipment operators from pieces of rib coal which could be knocked loose or, if the area is a walkway, injury to pedestrians by the equipment due to insufficient clearance. Service brakes and parking brakes on personnel carriers must be maintained in an operative condition. Accordingly, such brakes that have been allowed to deteriorate into an inoperative condition constitute a violation of Section 75.1725. Emergency and parking brakes that are not installed and maintained on rubber-tired haulage equipment or parking brakes not installed October 2003 (Release V-34) 129
MSHA PROGRAM POLICY MANUAL VOLUME V and maintained on other face equipment would constitute a violation of Section 75.523-3. Where block signals are used, not more than one locomotive, except pushers, should operate in any signal block at the same time unless by special authority. All mine traffic should be under the direction of a person(s) designated by the operator, and no traffic should be in transit without prior clearance, verbally or by use of block signals. Where seating facilities are provided, operators of equipment should be seated while such equipment is being operated. This section shall be used to require audible warning devices on all self-propelled equipment, including off-track equipment. Such devices shall be of the type provided by the manufacturer of the equipment and shall be maintained in operative condition. Self-propelled, rubber tired haulage equipment shall be equipped with sealed-beam lights. Rubber-tired, battery-powered mine tractors should be equipped with a suitable lifting jack and bar adequately secured or carried in a compartment. Since controls meeting the requirements of paragraph (m) are available, future notices to provide safeguards or 104(a) citations shall not give more than 30 days for compliance. October 2003 (Release V-34) 130
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