摘要
为解决夹河煤矿深部大断面3号交岔点难以支护的问题,分析可知3号交岔点变形破坏的主要原因是高地应力、开挖扰动以及支护体和围岩强度与结构的不耦合,据此提出了锚网喷+锚索+底角锚杆+中间岩柱双控锚索的耦合支护技术,现场应用表明:采用锚网索耦合支护技术后3号交岔点顶底板最大移近量为69 mm,两帮最大移近量为45 mm,3号交岔点变形得到了有效控制。
In order to solve the difficult support problem of No. 3 intersection of deep large cross section in Jiahe Mine,the paper analyzed the major causes of the deformation failure in No. 3 intersection were the high ground stress,mining and excavation turbulence and the uncoupling between the surrounding rock strength and structure.A coupling support technology of bolt/steel mesh/shotcreting+anchor+floor corner bolt+double control anchor in middle rock pillar was provided.The site application showed that after the coupling support applied, a max roof and floor convergence of No. 3 intersection was 69 mm,a max convergence of the two sidewalls was 45 mm and the deformation of No. 3 intersection was effectively controlled.
出处
《煤炭科学技术》
CAS
北大核心
2014年第5期13-16,共4页
Coal Science and Technology
基金
国家自然科学基金面上基金资助项目(51374214)
国家自然科学基金资助项目(51304210)
中央高校基本科研业务费专项资金资助项目(2011QL07)
关键词
深部矿井
大断面交岔点
变形机理
耦合支护
围岩稳定性
deep mine
large cross section intersection
deformation mechanism
coupling support
surrounding rock stability
