深部巷道U型约束混凝土拱架力学性能及支护体系现场试验研究  

Field test study on mechanical properties of U-type confined concrete arch centering and support system in deep roadway

作　　者：王琦[1,2] 李为腾[1,3] 李术才[1] 江贝[1] 阮国强 王德超[1,2] 张世国 刘文江 邵行 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 [3]山东科技大学土木建筑学院,山东青岛266590 [4]兖煤菏泽能化有限公司赵楼煤矿,山东郓城274705

出　　处：《中南大学学报（自然科学版）》2015年第6期2250-2260,共11页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51304125;51379114);山东省优秀中青年科学家科研奖励基金资助项目(BS2013NJ004);中国博士后科学基金面上资助一等资助项目(2013M540548);山东省博士后创新项目专项资助项目(201301004);煤矿安全高效开采省部共建教育部重点实验室开放基金资助项目(JYBSYS2014103)~~

摘　　要：针对处于深部、断层构造破碎带等条件下的难支护巷道,提出U型约束混凝土（UCC）拱架新型支护技术。对拱架的承载特性及变形规律等进行数值及室内试验研究,并明确新型拱架失稳破坏的关键部位,综合分析UCC拱架支护体系的作用机制。研究结果表明：UCC短柱具有较好的延性和后期承载能力,极限承载力相对U型钢短柱提高127%~196%;UCC拱架承载能力是对应U型钢拱架的2.16倍;UCC拱架支护体系作为一种新型的三维立体支护体系,围岩控制效果显著,该支护体系下巷道围岩变形量最大为53 mm,仅为U型钢拱架的20.6%,且UCC拱架能够提供高强支护阻力,有效保证支护体系的安全性。In order to solve the problem in deep rock roadway and roadway with structural fracture zone, a new support form, i.e. U-type confined concrete （UCC） arch centering, was developed.The bearing and deformation characteristics of the arch centering were researched experimentally, and the key position of the arch centering failure was confirmed. Finally, the action principle of the support system was analyzed. The results show that UCC short columns have better ductility and post-bearing capacity, and the ultimate beating capacity is increased by 127%---196% compared with that ofU-steel short columns, which shows that the ultimate beating capacity of UCC short columns is 2.16 times that of U-steel arch. UCC arch centering is a three-dimensional support system, the surrounding rock control effect is significant, and the maximum deformation of roadway surrounding rock is 53 mm under UCC arch centering, only 20.6% of that of U type steel arch frame. UCC arch centering can provide high support, guaranteeing the safety of supporting system effectively.

关 键 词：深部巷道 U型约束混凝土 拱架 力学性能 

分 类 号：TD32[矿业工程—矿井建设]