摘要
针对深部矿井中不规则工作面缩面开采支架安全高效回收问题,以张双楼煤矿21914工作面为研究对象,采用理论分析和数值模拟相结合的方法,探究了缩短工作面支架、刮板输送机随采随撤的快速回撤工艺以及支架回撤通道支护优化设计方案。研究表明,在缩面开采期间,优化设计了一次撤架、撤刮板输送机数量及位置,确定每个原班割煤5刀,工作面每推进3 m,拆除1台液压支架,工作面每推进6 m,拆除刮板输送机两节;采用优化后的工作面撤架通道支护方案后,在工作面开采扰动下超前支护段巷道顶板最大下沉量为97.8 mm,高帮侧最大位移量为99.6 mm,低帮侧最大位移量为85.5 mm,有效控制了巷道围岩变形。研究为类似条件下工作面缩面减架开采提供了参考。
Aiming at the problem of safe and efficient recovery of support in irregular working face reduced face mining in deep mine,taking No.21914 working face of Zhangshuanglou Coal Mine as the research object,the combination of theoretical analysis and numerical simulation was used to explore the rapid withdrawal process of reducing working face support and scraper conveyor with mining and the optimization design scheme of support withdrawal channel supporting.The study indicated that during the mining of reducing face,the number and position of withdrawing support and removing scraper conveyor were optimized,and 5 cutters were cut in each original class.For each 3 m of working face advancing,a hydraulic support was removed,and for each 6 m of working face advancing,two sections of scraper conveyor were removed.After adopting the optimized supporting scheme of the working face withdrawing support channel,the maximum subsidence of the roadway roof in the advance support section under the mining disturbance of the working face is 97.8 mm,the maximum displacement of the high side is 99.6 mm,and the maximum displacement of the low side is 85.5 mm,which effectively controls the deformation of the surrounding rock of the roadway and provides a reference for mining with reduced face and support under similar conditions.
作者
安文勇
An Wenyong(Zhangshuanglou Coal Mine,Jiangsu Xukuang Energy Co.,Ltd.,Xuzhou 221616,China)
出处
《煤炭科技》
2025年第3期138-144,共7页
Coal Science & Technology Magazine
关键词
缩短工作面
快速回撤
回撤通道
围岩控制
shorten the working face
rapid withdrawal
withdrawal channel
surrounding rock control
作者简介
安文勇(1976-),男,河北高碑店人,高级工程师,硕士,2011年毕业于中国矿业大学采矿工程专业,现任张双楼煤矿副矿长,从事煤矿开采生产组织管理工作。
