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Movement, accumulation and treatment measures of gas at top even angle in coal mining face

XIA Xin-chuan 1, ZHANG Xiu-cai 1, WANG Shi-tao 1,YANG Sheng-qiang 2 (1 Lianyungang City Baiji Mine, Xuzhou 221004, China; 2 China University of Mining and Technology, Xuzhou 221008, China)  
The paper firstly analyzed a movement and spread way of gas in air flow of mine roadway. The paper stated a gas movement process at the top even angle in seam roadway and coal mining face and the cause of gas accumulation in some coal area. The paper briefly analyzed the present applied measures to treat gas accumulation in some local area.
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