动压巷道离层变形特征及支护技术研究  

Research on separation and deformation feature and supporting technology of dynamic- pressure entry

作　　者：娄金福[1,2,3] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]煤炭科学研究总院开采设计研究分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013

出　　处：《煤炭科学技术》2015年第4期6-10 26,26,共6页Coal Science and Technology

基　　金："十二五"国家科技支撑计划资助项目(2012BAK04B08)

摘　　要：为了对比分析不同支护方式下围岩离层变形过程的差异,以铜川矿区复合顶板动压巷道为例,在同一回采巷道内分别设置工字钢棚试验段和锚杆支护试验段,采用巷道矿压在线监测系统实测两种支护方式下围岩离层变形的动态过程,探究不同支护方式下的围岩变形机理,为确定合理的巷道支护方式提供依据。实测结果表明:主动支护和被动支护时动压巷道离层变形过程有本质区别,在锚杆支护地段深部与浅部围岩以同步变形为主;而在工字钢架棚支护段,深部与浅部围岩的位移量差别较大,出现了较大的离层空间,棚式支护不能满足围岩变形要求。根据试验巷道围岩支护体的信息反馈结果,动压巷道应该采用主动支护方式,据此采用高预应力强力一次支护理论进行了动压巷道支护方案优化设计,改进后的支护方案能够满足动压巷道的支护要求。In order to analyze the fundamental difference in separation and deformation dynamic response between two supporting patterns in dynamic- pressure entry,the authors took complex roof dynamic- pressure entry of Tongchuan mining area asan example,set I- steel shed test section and rock bolting test section in the same roadway,measured the dynamic process of surrounding rock separation with on-line monitoring system,explored deformation mechanism under different support patterns,which provided a basis for conforming reasonable support patterns. The field measurement results showed that there was essential difference in dynamic- pressure entry deformation process between active support and passive support,the deep and shallow surrounding rock produced synchronous deformation at the rock bolting section; while the deep and shallow surrounding rock produce big displacement and bed- separation space,so shed support can't resist surrounding rock deformation. Therefore,we decide to adopt rock bolting with high prestress and intensive bolting theory,and make reasonable support scheme for dynamic- pressure entry. The support scheme can meet the support request of dynamic- pressure entry.

关 键 词：主动支护 被动支护 动压巷道 离层动态响应 围岩变形机理 

分 类 号：TD353[矿业工程—矿井建设]