托顶煤巷道全锚索支护参数匹配性研究  

Research on Parameter Matching of Full Anchor Cable Support in Top-coal Roadway

作　　者：张云峰[1] 张飞腾 张永强 李冲[2] ZHANG Yunfeng;ZHANG Feiteng;ZHANG Yongqiang;LI Chong(School of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Mining Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州市221116 [2]中国矿业大学矿业工程学院,江苏徐州市221116

出　　处：《矿业研究与开发》2021年第2期104-108,共5页Mining Research and Development

基　　金：国家自然科学基金项目(51874277).

摘　　要：为解决80807工作面回风顺槽复合顶板下沉与支护体失效问题,对托顶煤巷道的变形特点与主控因素进行了研究,对比了不同支护体长度、预应力下的巷道支护效果,提出了双层钢筋网和长短锚索组合支护方案,并通过数值模拟进一步研究确定了不同预应力匹配下的巷道变形与顶板应力分布情况,得出如下结论:顶板平均压应力随支护体预应力增长而升高,现场应优先提升短锚索预应力,长锚索预应力值应选取为260kN。根据研究结论确定了工业性试验方案,实施结果表明巷道围岩控制效果大幅改善。Aiming at the engineering problems of roof subsidence and support failure of compound roof in return air roadway of 80807working face,the deformation characteristics and main control factors of the top-coal roadway support were analyzed.The supporting effect of roadway under different supporting body lengths and prestresses was studied.The support scheme combined double-layer reinforcement mesh and anchor cable was put forward.The roadway deformation and roof stress distribution under different prestresses matching were studied and determined by numerical simulation.The conclusions are as follows.The average compressive stress of roof increases with the increase of prestress of supporting body.The prestress of short anchor cable should be increased firstly in the field,and the prestress value of long anchor cable should be selected as 260 kN.According to the research conclusion,the industrial test scheme is determined.The practical results show that the control effect of roadway surrounding rock is greatly improved.

关 键 词：托顶煤巷道 锚索支护 锚索长度 预应力 

分 类 号：TD353[矿业工程—矿井建设]