浅埋近距离下层煤综采面过上覆采空区煤柱动压防治技术  

Control technology of dynamic mine pressure during fully mechanized mining face in lower seam passing concentrated coal pillar of upper goaf of close distance shallow coal seams

作　　者：侯志成[1] 

机构地区：[1]神华神东煤炭集团公司生产管理部,陕西神木719315

出　　处：《煤炭工程》2016年第4期54-57,共4页Coal Engineering

摘　　要：基于神东矿区浅埋近距离下煤层过上覆采空区集中煤柱易发生动载矿压,导致大面积切顶压架事故,结合石圪台矿31201综采面动压防治实践,分析得出采动影响导致上覆采空区集中煤柱失稳及其上覆基岩破断、回转,进而使下煤层基岩关键块结构由回转失稳变为突发性的滑落失稳,上下基岩层关键块体失稳产生的冲击载荷瞬间作用直接导致了动压事故的发生。通过采取爆破集中煤柱、缩短工作面长度、等压等技术措施,并采用微震监测、地面钻孔多点位移计和地表沉降观测等手段进行指导和验证,有效解决了特殊开采条件下现场动载矿压防治的问题,实现了安全生产。According to the serious influence of the dynamic mine pressure under concentrated coal pillar of goaf in shallow seam longwall mining of Shengdong mining area,which has caused large area roof falling and support crushing accidents,the mechanism of the accident is analyzed combining the example of No.31201 coal mining face of Shigetai coal mine.The mining influence has caused instability of concentrated coal pillar in upper seam,failure and rotation of overlying bedrock,which has leaded to sudden sliding of key block in lower seam bedrock,caused impact load of the upper and lower bedrock,leading to dynamic pressure accident.With the measures of concentrated coal pillar blasting,face length shortening and yield mining,and guided and validated by the microseismic monitoring,internal displacement monitoring and surface ground observation,the dynamic mine pressure accident is prevented,realizing safe production.

关 键 词：浅埋煤层 近距离煤层群 上覆采空区 集中煤柱 动载矿压 微震监测 

分 类 号：TD324[矿业工程—矿井建设]