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开滦赵各庄矿是有煤尘爆炸、自燃发火、煤和沼气突出危险的高沼气矿井。实测表明:十水平12煤层沼气绝对涌出量为4.0米~3/分,9煤层绝对涌出量一般在1.8～6.5米~3/分。矿井的自燃性煤层主要是井口西翼12煤层和9煤层,自燃发火期为8～10个月。 井下所采用的采煤方法主要有:在急倾斜区域采用斜切煤顶、柔性掩护支架等;在倾斜区域使用倾斜分层金属网假顶采煤法。落煤方式均为放炮落煤。 为了预防和处理井下煤层自燃火灾的发生,我矿从1952年以来,一直采用黄泥灌浆的方法。开始,是从地面下土在井下用搅拌机制浆,通过小石门向采空区灌注;1954年,改为在地面人力挖土,固定灌浆站制浆,通过注浆管道进行静压灌浆;1958年,改进为移动灌浆站,把水力
Kailuan Zhaochuangzhuang mine is a coal dust explosion, spontaneous combustion, highlighting the dangers of coal and methane gas marsh gas wells. The measured data show that the absolute emission of biogas from 12 horizontal coal seams is 4.0 m 3 / min and that of 9 coal seams is 1.8-6.5 m 3 / min. Coal spontaneous combustion of the mine is mainly wellhead West Wing 12 and 9 seam, spontaneous combustion period of 8 to 10 months. Downhole coal mining methods are mainly used in the steeply inclined areas using chamfered coal roof, flexible shield bracket, etc .; in the inclined area using inclined stratified metal mesh roof mining method. Falling coal way is demolition coal. In order to prevent and deal with the occurrence of spontaneous combustion fire in underground coal seams, the mine has been using the method of grouting of yellow mud since 1952. From the ground up, the soil was pulped with a mixer downhole and poured into the goaf through the Little Shimen. In 1954, human resources were excavated on the ground, and the fixed grouting station was pulped for static pressure grouting through a grouting pipe. In 1958, In the year, the improvement for the mobile grouting station, the hydraulic