组合岩层端锚锚杆预应力场分布规律模拟研究  

Study on Prestress Field Distribution Law of End Anchoring Rock Bolt in Combination Rock

作　　者：周逸群 林健[1,2] 王正胜[1,2] 杨建威[1,2] ZHOU Yi-qun;LIN Jian;WANG Zheng-sheng;YANG Jian-wei(Coal Mining & Designing Department,Tiandi Science & Technology Co ,Ltd ,Beijing 100013,China;Mining Institute,China Coal Research Institute,Beijing 100013,China)

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]煤炭科学研究总院开采研究分院,北京100013

出　　处：《煤矿开采》2017年第6期46-49,33,共5页Coal Mining Technology

基　　金：国家自然科学基金联合基金项目(U1261211)

摘　　要：在不考虑原岩应力的条件下,通过有限差分数值模拟软件FLAC3D,对软硬岩层不同组合条件下锚杆预应力场分布规律进行数值模拟研究。结果表明,在软岩和硬岩中,较高的连续压应力分布范围基本一致,但锚杆产生的压应力由软岩层向硬岩层方向传递的效果要明显优于压应力由硬岩向软岩传递的效果。现场支护中,可通过施加高预紧力来扩大锚杆支护有效压应力区范围;同时可调整锚固段或锚杆长度,使结构面位于压应力较高的有利位置,避免锚杆因水平应力的影响出现剪断或离层现象。Rock bolt prestress field distribution law in different combination situation soft and hard were studied with numerical simulation by FLAC3D without regard to In situ stress The results showed that,in soft and hard rock,the continuous higher compressive stress scope was almost similar,but the transitive effect that from soft rock to hard rock was more preceded than from hard rock to soft rock,but the effectively compressive stress scope of rock bolt supporting could be improved by applied large prestress in field,and anchoring length and rock bolt length could be adjusted at the same time,structural face located at some favorable position where compressive stress was high,shearing failure and separation could be avoided as horizontal stress

关 键 词：组合岩层 预应力场 分布规律 端部锚固 

分 类 号：TD322[矿业工程—矿井建设]