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Probe into the Geological Factors in Coal & Gas Extrusion in 25041 Working Face in Yanma Mine

SONG Zhi-min1,GENG Qing-sheng2,ZHANG Zhen-xing3(1.Zhengzhou Economics and Management Institute,Zhengzhou 451191,China;2.Bureau of Security Inspection,Jiaozuo Coal Industry Limited Company,Jiaozuo 454002,China;3.Information Center of Henan Coal Industry Administration Bureau,Zhengzhou 450003,China)  
Yanma Coal Mine locates at the center of Jiaozuo Coal mine with large gas content.Occurrence of gas,coal and gas outburst were controlled by various geological factors.Yanma minefield,a block with large gas content,coal thickness variation in structure,is controlled by Fenghuangling Fault and Yuhe Fault.Accident occurring on May 22,2005 in the coal and gas,pressure is the geological structure.To pressure gas and coal combined result of a variety of factors,such as geological structure,tectonic pressure,gas and coal.Geological structure is the determining factor causing this.
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