浅埋煤层工作面矿压显现规律实测分析及控制研究  

Underground Pressure Behavior Analysis of Mining Face in Shallow-buried Coal-seam and Its Control

作　　者：何正刚 

机构地区：[1]北京天地玛珂电液控制系统有限公司,北京100013

出　　处：《煤矿开采》2015年第1期82-85,77,共5页Coal Mining Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2010CB226806)

摘　　要：基于沙坪矿18204综采工作面回采期间各测站采集的支架工作阻力数据,分析初次来压时支架压死的事故原因,得出浅埋单一关键层条件下,顶板初次来压期间中部支架工作阻力普遍高于两端支架阻力,动载系数较大,覆岩整体破断裂隙直接贯通地表的矿压显现特征。通过Fl AC3D和UDEC数值模拟软件,模拟分析不同推进速度下矿压显现规律,提出通过缩短工作面长度和加快推进速度可明显减小工作面超前支承压力和影响范围,降低煤壁水平位移量,并得到了现场的验证,为浅埋单一关键层下煤层的安全开采提供有益参考。The cause of powered support crushing in first weighting of 18204 full-mechanized mining face in Shaping Colliery was analyzed on the basis of working resistance data of powered support. It was obtained that working resistance of middle powered supports was generally larger than those at the two-end of mining face,dynamical load coefficient was large,and the mining fissures of surrounding rock reached surface. Underground pressure behaviors rule under different mining speeds were simulated with FLAC3 D and UDEC. It was put forward that advanced abutment pressure,its influence range and horizontal displacement of coal-wall could be reduced obviously by shortening face length and increasing mining speed,which was proved by practice. This provided reference for safe mining under shallow-buried single key strata.

关 键 词：浅埋深 矿压显现规律 初次来压 推进速度 

分 类 号：TD323[矿业工程—矿井建设]