近距离下部特厚煤层工作面安全错距研究  

Safety Distance of Mining Faces in Closed Extremely-thick Coal-seam

作　　者：王普[1] 曲华[1] 许斌[1] 武泉林[1] 张培鹏[1] 

机构地区：[1]山东科技大学矿山灾害预防与控制重点实验室,山东泰安271002

出　　处：《煤矿开采》2014年第4期31-34,共4页Coal Mining Technology

摘　　要：在近距离下部特厚煤层条件下,由于下部煤层厚度大,经验方法类比计算的工作面错距偏小。因此根据鲍店上部2煤层与下部3煤层实际情况,采用UDEC2D数值模拟及理论分析,综合研究了近距离下部特厚煤层工作面开采的安全错距。研究表明:近距离下部特厚煤层工作面同采时,不同工作面错距条件下的应力分布与覆岩运移特征有着明显的差异,当工作面错距大于50m时相互采动影响较小,确定工作面安全错距为60m。Under the condition of closed extremely-thick coalseams , safety distance of mining faces calculated by experience analogy method was small.Applying UDEC^2D software and theoretical analysis , safety distance of mining faces was researched on the basis of 2nd Coal and 3rd Coal condition.Result showed that there were obvious difference in stress distribution and surrounding rock movement characteristic under different safety distances .When the distance was larger than 50m, mutual influence was small.Therefore, safety distance was designed as 60m.

关 键 词：近距离 下部特厚煤层 工作面错距 应力分布 覆岩移动 

分 类 号：TD822.1[矿业工程—煤矿开采]