The Study Of Gas Occurrence Law And Outburst Characteristic Of Yixin Mine

Based on the plate tectonic and gas geology theory,the paper studys the tectonic evolution characteristic of Yixin c oal mine in He gang and gas occurre nce tec tonic level control feature by combining with conte mporary tectonic stress field characteristic,believing tha t NW te ctoni c extrusion which lea d to gas accumulation a nd NE tec tonic tension which contribute to gas dissipation.The the sis apply mine geology condition to gas geological unit division,and make a research on gas geol ogical rule which includes four gas geological units,finding out that the bedroc k thickness has a great effect on gas conte nt and set up mathematical model to predict t he deep part coal seam gas conte nt.The corresponding level of 8m3/ t of 15 th and 22 th gas content is 560 m and462m,and the corresponding level of 15m3/min of 15 th and 22 th gas emiss ion rate is740 m and 668 m.Combining wi th the 214 analytical results of tectonic coal,a r esearch on the tectonic coal t hickne ss and distri buting cha r act eristi c of 15 th and 22 th coalse ams is done.According to the fact that the complex distribution of geological structures a nd Yixin is a hi gh gas and out burst mine,the paper analyze the the case of coal and gas outburst in recent yea rs,concluding that it most occ ur in composite part of t ectonics and high stress concentration region.By the study on tectonic coal thickness and gas cont ent of outburst poi nt,it concludes that coal and gas outburst accident of Yixin coal mine res ult by the comprehensively effect including tec tonic stress 、 te conic c oal and gas.The st udy provides the clear direction a nd theoretical foundation for mi ne disa ster,has moment ous significance on mine safety production.