基于能量平衡理论的冲击矿压巷道支护参数研究  

Study of Roadway Support Parameters Subjected to Rock Burst Based on Energy Balance Theory

作　　者：高明仕[1] 张农[1] 窦林名[1] 王恺[2] 阚甲广[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室能源与安全工程学院,江苏徐州221008 [2]中国煤炭工业协会,北京100083

出　　处：《中国矿业大学学报》2007年第4期426-430,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50490270;50474068;50674085);国家重点基础研究发展规划(973)项目(2005CB221504);"十一五"国家科技支撑计划(2006BAK04B02)

摘　　要：论文基于能量平衡理论,推导分析了巷道围岩结构在震源冲击扰动时破坏失稳的能量准则.结合己二采区22040机巷防冲支护工程实践,实验室测定煤样冲击能指数为4.02,弹性能指数为3.743,确定巷道围岩具有中等冲击倾向,设定冲击矿压震级ML=2.5,采用三维锚索配合普通圆钢锚杆、π型钢带及金属网联合支护进行了该巷道防冲支护参数设计.实践表明,设计支护系统及时吸收了该巷道发生的约2.0震级的冲击动能,顶底板移进量422 mm,两帮移进量375 mm,巷道围岩结构仍保持稳定,有效防止了巷道冲击矿压破坏.Based on energy balance theory, the energy rule was deduced and analyzed for road- way surrounding structure destruction and failure subjected to rock burst. Combining with the Ji＇er mining district 22040 roadway engineering application, the rock burst tendency of coal samples were tested in lab. The results show that the dynamical energy index is 4.02, and the elastic energy index is 3. 743, the rock burst tendency of roadway was confirmed as middle grade, and the shock magnitude ML =2.5 was assumed simultaneously. The roadway support parameters were designed using the uniting support means including 3-dimension anchor and bolt-mesh-steel belt. The dynamical energy produced in the process of rock burst（about ML ≈ 2.0）was absorbed by the designed support system, the displacement of roof to floor is 422 mm, the convergence of ribs is 375 mm, the 22040 roadway is maintained in good conditions, and sufficiently prevents the destruction of rock burst in coal mining.

关 键 词：冲击矿压 巷道支护 能量平衡 参数设计 工程实践 

分 类 号：TD324[矿业工程—矿井建设]