近直立特厚煤层冲击地压致灾过程分析  

Rockburst process analysis in steeply-inclined extremely-thick coal seam

作　　者：杜涛涛[1] 李康 蓝航[1] 刘旭东 

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]神华新疆能源有限责任公司,新疆乌鲁木齐830084

出　　处：《采矿与安全工程学报》2018年第1期140-145,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51304116);国家重点研发计划项目(2017YFC0804209;2017YFC0804204;2016YFC0801401;2016YFC0801403);天地科技开采设计事业部青年创新基金项目(KJ-2014-TDKC-12);天地科技技术创新基金项目(KJ-2014-TDKC-05)

摘　　要：为了揭示近直立特厚煤层冲击地压发生过程,采用PASAT-M便携微震仪和ARAMIS M/E微震监测系统进行近直立特厚煤层冲击地压致灾因素识别。利用PASAT-M便携式微震仪对水平分层开采形成的"高阶段"区域应力异常进行探测,以及ARAMIS M/E微震监测系统对近直立围岩进行监测,研究了"高阶段"区域的应力分布和围岩的致灾关键层与近直立煤层冲击地压发生关系。结果表明:应力异常和"诱冲关键层"是近直立特厚煤层的冲击地压主要致灾因素,"高阶段"区域致灾因素是煤体高应力集中,"诱冲关键层"是B2-B3煤层之间的岩柱,近直立特厚煤层冲击地压致灾过程是采掘活动扰动下的煤体高应力释放过程和由"诱冲关键层"产生的"诱冲事件"引发冲击显现的过程。In order to reveal the steeply-inclined extremely-thick coal seam rockburst process, the PASATM portable microseismograph and the ARAMIS M/E microseismic monitoring system are used to identify hazard factors which could induce the rockburst in the steeply-inclined extremely-thick coal seam. By using PASAT-M portable microseismograph to detect the stress distribution of ＂high level＂ region and using the ARAMIS M/E microseismic monitoring system to monitor nearly vertical sur- rounding rock, the relationship between the ＂high level＂ region of the stress distribution and the rock- burst disaster key stratum in steeply-inclined extremely-thick coal seam rockburst. The research results showed that the abnormal stress distribution and ＂rockburst induced by key layer＂ are main factors causing rockburst disaster in the steeply-inclined extremely-thick coal seam. The factor causing rock- burst disaster of ＂high level＂ region is the high stress concentration and the B2-B3 coal pillar is th ＂rockburst disaster key layer＂. The rockburst process in the steeply-inclined extremely-thick coal seam is the process of high stress coal releasing by mining and the occurrence of process of＂Microseismic events caused rockburst＂ is also induced by ＂rockburst disaster key laver＂.

关 键 词：近直立特厚煤层 冲击地压 致灾因素 “诱冲关键层” 

分 类 号：TD353[矿业工程—矿井建设]