厚表土层薄基岩条件下分层开采覆岩破坏规律研究  

Research on Failure Regularity of Overburden Rock in Process of Thick Seam Slicing Mining

作　　者：陈学星[1] 刘伟韬[2] 张培森[2] 

机构地区：[1]山东理工大学,山东淄博255000 [2]山东科技大学资环学院,山东青岛266510

出　　处：《矿业安全与环保》2010年第6期20-22,26,共4页Mining Safety & Environmental Protection

摘　　要：运用实测和模拟研究的方法,研究了厚表土层薄基岩条件下厚煤层分层开采时煤层顶板上覆岩层破坏规律以及导水断裂带的发育高度。一分层回采结束后实测导水断裂带发育高度为34.7 m,经过3.5 a后实测断裂带高度降为30.7 m;下分层开采结束后断裂带发育高度为41.51 m。测试结果表明,随着工作面停采时间的增加,采动裂隙尤其是上部的微小裂隙将会部分闭合,致使导水断裂带发育高度降低;当基岩柱厚度较小时,导水断裂带发育高度也较小;同时厚煤层分层开采随分层数的增加,断裂带的高度增长幅度逐渐降低。In this paper,research was made on the failure regularity of overburden roof rock and the development height of flowing fractured zone in the condition of thick seam slicing mining with the method of actual measurement and simulation study,the actually measured development height of the fractured zone was 34.7 m after the extraction of the first slice,but it reduced to 30.7 m after 3.5 a;after the extraction of the lower slice finished,the measured value was 41.51 m.The measured results showed that the mining-induced fractures,especially the upper micro-fractures,would closed partly with the increase of the coal mining stop time,which would lead to the decrease of the development height of water flowing fractured zone.At the same time,the increase range of the height of fractured zone would reduce gradually with the increase of slice number during thick seam slicing mining.

关 键 词：覆岩 分层开采 破坏规律 导水断裂带 

分 类 号：TD32[矿业工程—矿井建设] TD745.2