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

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MSHA PROGRAM POLICY MANUAL VOLUME V When emergency material is stored at a central warehouse or building supply company, the inspector should determine whether the material will be available for shipment to the mine at all times. 75.1100-3 Condition and Examination of Firefighting Equipment All firefighting equipment shall be maintained in a usable and operative condition. Rock dust shall be dry, water cars shall be kept filled and operative, water containers and pails shall be in usable condition, and chemical extinguishers shall be examined every 6 months. The inspection of chemical extinguishers should determine that: 1. The extinguisher is in its designated place. 2. Access and visibility to the extinguisher are not obstructed. 3. Seals should not be broken. This is an indication that the extinguisher may not be full. Some extinguishers have to be lifted slightly to determine if they are full. 4. The extinguisher has not been physically damaged or have any obvious defects (clogged nozzle, corrosion, leakage, damaged hose, etc.). 5. The examination record on the tag is up-to-date. This section is interpreted to mean that water shall be kept constantly in the waterlines in sufficient amounts to meet the requirements of Section 75.1100-1(a). The phrase "50 gallons of water per minute," as used in Section 75.1100- 1(a), does not mean for only 1 minute. In those instances where there is danger of freezing and bursting the waterlines if water is kept in the lines, the mine operator should consider a pressurized system, or should file a petition for modification under the provisions of Section 101(c) of the Act. 75.1101 Deluge-Type Water Sprays, Foam Generators; Main and Secondary Belt-Conveyor Drives In requiring fire suppression systems for belt conveyor drives, apply the same rule used in Section 75.603 and in Section 75.1103, which permit the use of belt conveyor drives without a fire suppression system for 24 production shift hours after they have been installed before a citation is issued. October 2003 (Release V-34) 97
MSHA PROGRAM POLICY MANUAL VOLUME V The figures "50 feet" and "150 feet" referred to in Sections 75.1101, 75.1101-5(b)(1) and (2), 75.1101-7(b) and 75.1101-14(a) mean lineal feet of belt entry. Guidelines for Fire Protection at Surface Located Drive Units for Underground Belt Conveyors: 1. All belt drive units located within 25 feet of any intake airway should be equipped with an automatically actuated fire suppression system as described in this Section. 2. Belt drive units located more than 25 feet but less than 50 feet from any intake airway should be equipped with an automatically actuated fire suppression system, unless fire doors or air lock doors are provided in the belt entry and in all intake entries within 50 feet of the drive unit. 3. Belt drive units located more than 50 feet but less than 100 feet from any intake airway should be equipped with a sensor system which will automatically sound an alarm and stop the conveyor drive motor when a fire occurs on or near such belt drive. The alarm shall be at a location where it can be heard by a responsible person who is always on duty while men are underground. If a responsible person is not stationed where he can hear the alarm and/or is not always on duty while the belt is running and miners are underground, a fire door or air lock should be installed in the belt entry and all intake entries within 100 feet of the belt drive. If the conditions are not met, a fire suppression system should be required. 4. Belt drive units located 100 feet or more from any intake airway should be protected with one or two portable fire extinguishers as applicable under Sections 75.1100-2(e)(1) or (e)(2) (electrical installations). Measurements made to determine the distance between the drive unit and the mine opening should be made between the belt drive roller and the nearest mine opening or intake airway, as applicable. The fire suppression system, fire door/air lock doors, and sensor controlled stop and alarm described in paragraphs 1, 2, 3 and 4 are in addition to October 2003 (Release V-34) 98
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