高刚度大强度支护方式控制采空区巷道围岩的机理及实践  

Mechanism and Practice of High Stiffness and Big Strength Support Mode Controlling Roadway Surrounding Rock in Gob

作　　者：凌涛[1] 王卫军[1] 彭刚[1,2] 姚广[3] 郭罡业 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201 [2]中国矿业大学矿业工程学院,江苏徐州221116 [3]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《煤矿安全》2015年第8期216-219,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51434006;51374105);湖南省教育厅资助项目(14C0427);湖南科技大学研究生创新基金资助项目(S130003)

摘　　要：为确保巷道顺利穿越采空区,采用UDEC软件对平煤六矿煤层开采过程覆岩破坏以及应力变化情况进行模拟分析。采用太沙基地压理论计算了斜井穿越采空区段巷道围岩应力,在此基础上对U型钢支架结构进行力学分析,结果表明U36型钢支架能有效维护破碎围岩的完整性。提出采用提高初期承载能力、改善支架受力状况和支护结构补偿的加强支护对策。工程实践表明采用上述对策后能有效提高支护结构的整体承载能力及稳定性,确保穿越采空区破碎围岩巷道的稳定。In order to ensure the roadway crossing gob smoothly,overburden failure and stress changes are simulated and analyzed by UDEC software during the coal mining in Pingdingshan No. 6 Mine,using pressure theory of Karl Terzaghi to calculate stress of inclined shaft through gob,U- steel support structure is analyzed by mechanics principle,and results showed that the U36 steel support can effectively maintain the integrity of crushed surrounding rock. The intensive supporting strategy is proposed,such as improving early bearing capacity,enhancing stress state of support,and adopting the structural compensation of support. Engineering practice indicates that the support can effectively increase the overall bearing capacity and stability of structure,which ensures the stabilization of roadway through the gob after using the above countermeasures.

关 键 词：破碎围岩 刚性U型钢支架 承载能力 覆岩破坏 支护方式 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]