摘要
针对回撤通道受采动影响巷道顶板稳定性差、变形大等问题,以内蒙古高家梁煤矿20117回撤通道为工程背景,提出回撤通道顶板补强支护方案,建立回撤通道锚固梁结构力学模型,通过理论计算分析了锚固梁结构的稳定性,并在20117回撤通道进行现场实践。结果表明:20117回撤巷道顶底板移近量较小,巷道相对比较稳定,优化后的锚(网)索、垛式支架联合支护方式对围岩起到了加固与强化作用,很好地控制了围岩变形,保证了工作面回撤安全。
In view of the problem that the retracement channel is affected by mining and the stability of the roof of the roadway is poor and the deformation is large,the 20117 retracement channel of Gaojialiang Coal Mine in Inner Mongolia is taken as the engineering background,and the reinforcement plan of the retracement channel roof is proposed,and the anchor beam structure of the retracement channel is established.The mechanical model analyzes the stability of the anchor beam structure theoretically and conducts field practice in the 20117 retracement channel.The results show that the displacement of the roof and floor of the 20117 retracement roadway is small,and the roadway is relatively stable.The optimized anchor(net)cable and truss type support method can strengthen and strengthen the surrounding rock and control it well.The deformation of the surrounding rock ensures the safety of the working face.
作者
杨尚
宁建国
商和福
茹文凯
郝嘉伟
YANG Shang;NING Jian-guo;SHANG He-fu;RU Wen-kai;HAO Jia-wei(State Key Laboratory of Mining Disaster Prevention and Control Cofounded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《煤炭工程》
北大核心
2019年第11期69-73,共5页
Coal Engineering
基金
国家自然科学基金资助项目(51574154).
关键词
浅埋煤层
回撤通道
顶板支护
围岩控制
shallow coal seam
retracement channel
roof support
surrounding rock control
