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Modified Shearer Clearer System for Dust and Methane Control.

PB95104873

Publication Date	1994
Personal Author	Cecala, A. B .; Jayaraman, N. I.
Page Count	18
Abstract	This report provides a detailed description of the Bureau of Mines designed modified shearer clearer system. Engineering drawings are provided for all major components of this system. The modified shearer clearer system is a revised version of the original system intended to improve the ventilation around both cutting drums. The original shearer clearer technique was solely a dust control technique that has been effective in lowering shearer operator's dust exposures. The technique uses a series of water sprays that not only knock down a portion of the dust cloud but also act as small fans that move a substantial amount of air and keep the dust cloud from dispersing over the shearer body. The modified version is composed of two additional spray blocks for improved air movement around both cutting drums, thus lowering methane levels and the likelihood of an ignition. A laboratory study performed with the modified version in a full-scale longwall gallery resulted in a 73 pct reduction in methane concentrations at the shearer machine for both cut directions. The air moving capabilities of the system provides more turbulence at the cutting drums and reduces methane levels.
Keywords	Air pollution control Shearer loaders Longwall mining Dust control Methane Occupational safety and health Occupational exposure Cutting machines Design criteria Spraying Coal miners Ventilation Indoor air pollution Mining research Air flow Coal seams Water sprays
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68G - Environmental Health & Safety 68A - Air Pollution & Control 57U - Public Health & Industrial Medicine
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 94-14055. See also PB86-205416.
Document Type	Technical Report
Title Note	Information circular/1994.
NTIS Issue Number	199501

Modified Shearer Clearer System for Dust and Methane Control.

Modified Shearer Clearer System for Dust and Methane Control.
PB95104873

Publication Date	1994
Personal Author	Cecala, A. B .; Jayaraman, N. I.
Page Count	18
Abstract	This report provides a detailed description of the Bureau of Mines designed modified shearer clearer system. Engineering drawings are provided for all major components of this system. The modified shearer clearer system is a revised version of the original system intended to improve the ventilation around both cutting drums. The original shearer clearer technique was solely a dust control technique that has been effective in lowering shearer operator's dust exposures. The technique uses a series of water sprays that not only knock down a portion of the dust cloud but also act as small fans that move a substantial amount of air and keep the dust cloud from dispersing over the shearer body. The modified version is composed of two additional spray blocks for improved air movement around both cutting drums, thus lowering methane levels and the likelihood of an ignition. A laboratory study performed with the modified version in a full-scale longwall gallery resulted in a 73 pct reduction in methane concentrations at the shearer machine for both cut directions. The air moving capabilities of the system provides more turbulence at the cutting drums and reduces methane levels.
Keywords	Air pollution control Shearer loaders Longwall mining Dust control Methane Occupational safety and health Occupational exposure Cutting machines Design criteria Spraying Coal miners Ventilation Indoor air pollution Mining research Air flow Coal seams Water sprays
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 68G - Environmental Health & Safety 68A - Air Pollution & Control 57U - Public Health & Industrial Medicine
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 94-14055. See also PB86-205416.
Document Type	Technical Report
Title Note	Information circular/1994.
NTIS Issue Number	199501