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

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MSHA PROGRAM POLICY MANUAL VOLUME V travelway and the side of the block of coal from which coal is being extracted; and c. The control station and the headpiece and tailpiece of the conveyor, and all surfaces within 5 feet horizontally from the control station, head-piece and tailpiece. 2. When shuttle cars are used to transport the coal from the continuous miner to the section loading point, illumination shall be provided in accordance with the following: a. The face, ribs, roof, floor, and exposed surfaces of mining equipment between the face and the outby edge of the rear bumper of the continuous-mining machine shall be illuminated by the stationary lighting fixtures in accordance with the requirements of paragraph (e)(4) or by lighting fixtures installed on the continuous-mining machine in accordance with the requirements of paragraph (e)(1). b. The shuttle car roadway shall be illuminated by stationary lighting fixtures in accordance with the requirements of paragraph (e)(4) or by lighting fixtures installed on the shuttle car in accordance with the requirements of paragraph (e)(6). Longwall Mining Equipment Problems have been encountered in illuminating the coal face and face conveyor to 0.06 footlamberts in longwall mining installations operating in coal seams under 42 inches in thickness. The problems have been caused by the lack of sufficient clearance between the bottom of the roof support chocks and the side of the face conveyor, leaving little or no space through which light fixtures installed on the chocks can cast light on the face conveyor or the coal face. Therefore, in determining compliance with the illumination requirements for longwall mining installations operating in coal seams less than 42 inches in thickness, measurements shall not be taken on the face conveyor or the coal face. Measurements shall be taken the entire length of the travelway and the area within a distance of 5 feet horizontally from the control station, headpiece, and tailpiece. High spillboards are installed on many longwall face conveyors so that the coal will be retained on the face conveyor to prevent spillage. These spillboards are necessary to prevent spilled coal and coal dust from accumulating along the travelway and between the roof-support shields or chocks. In some instances, the roof-support shields or chocks barely clear the spillboards. February 2003 (Release V-33) 152
MSHA PROGRAM POLICY MANUAL VOLUME V The spillboards on longwall face conveyors are considered "other obstructions necessary to insure safe mining conditions," as provided in Section 75.1719-3(b)(8). Consequently, in determining compliance with the illumination regulations for longwall mining installations, light measurements shall not be made of areas where shadows are cast by spillboards installed on the longwall face conveyors. Roof-Bolting Equipment When the mining height is less than 42 inches, measurements shall not be taken of the area in front of and to the side of the roof-bolting machine operator(s) position(s). This does not apply to roof drills that are an integral part of a continuous mining machine. Light fixtures installed adjacent to supply trays on dual-head roofbolting machines create objectionable glare to the operator and helper. Therefore, to allow removal or repositioning of these light fixtures, the lighting system shall be considered to be in compliance if the required level of light is provided as determined by illumination measurements made with the drill heads either together or separated approximately 8 feet and in position to drill holes or install roof bolts. Shuttle Cars and Other Self-Propelled Equipment The requirements of paragraph (e)(6) apply at all times when shuttle cars are being trammed in the working place even though a continuousmining machine or loading machine is also being operated in the same working place. However, this does not prevent the shuttle car operator from turning the headlights out while the shuttle car is under the boom of the continuous mining machine or loading machine. When determining the height and width of the coal surface to be illuminated as provided in paragraph (e)(6)(ii), the maximum height of the equipment (including sideboards, cabs, and canopies) and the maximum width of the equipment (including bumpers, tires, cabs, and canopies) shall be used. The height and width of the coal surface that is required to be illuminated will be the same in both directions of travel. When the mining height will not permit installation of light fixtures at a location that will light the area directly in front of shuttle cars, tractors, maintenance vehicles, scoops, load/haul/dump vehicles, etc., the unshaded areas outlined on the following illustration may be lighted and measurements taken accordingly. February 2003 (Release V-33) 153
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