回采工作面过顶板及煤层空巷技术  

Technology of Mining Face Through the Roof and Coal Seam Empty Roadway

作　　者：高亚洲 GAO Yazhou(Xinqiao Coal Mine,Yongmei Group Co.,Ltd.,Yongcheng 476600,China)

机构地区：[1]永煤集团股份有限公司新桥煤矿,河南永城476600

出　　处：《矿业工程研究》2025年第1期35-43,共9页Mineral Engineering Research

摘　　要：部分工作面回采过程中存在过空巷问题,出现顶板下沉、岩层断裂失稳或大面积冒顶和片帮等现象,严重制约工作面正常开采.针对工作面连续过顶板和煤层空巷典型问题,以永煤集团下属矿井过空巷群回采工作面为工程背景,构建工作面过空巷力学模型,提出工作面连续过空巷群的施工及支护方案,模拟分析实施加固方案后的应力分布规律.结果表明:工作面推进过空巷各阶段,实体煤应力重新分布,应力曲线依次呈现超前应力、马鞍形应力、拱形应力曲线分布.工作面过顶板空巷的安全岩柱为4 m;顶板空巷采用木垛填充、煤层空巷采用Φ21.6 mm×9200 mm的锚索补强支护方案能有效降低围岩的应力集中程度,减缓塑性区的发育破坏,现场应用后工作面实现正常回采.In the process of mining of some working faces,there are such problems of passing through abandoned roadway as roof subsidence,rock stratum fracture and instability,or large scale roof collapse and rib spalling occur,which have seriously restricted the normal mining of the working face.Taking the mining working face passing through the group of abandoned roadways in a mine affiliated to Yongmei Group as the engineering background,a mechanical model of the working face passing through the abandoned roadway is built.The construction and support schemes for the working face to continuously pass through the group of abandoned roadways are proposed,and the stress distribution law after the implementation of the reinforcement scheme is simulated and analyzed.The results show that in each stage of the working face advancing through the abandoned roadway,the stress of the solid coal is redistributed,and the stress curves successively present the distributions of advanced stress,saddle shaped stress,and arch shaped stress curves.The safe rock pillar for the working face to pass through the roof abandoned roadway is 4 m.The support scheme of filling the roof abandoned roadway with wooden cribs and reinforcing the coal seam abandoned roadway withΦ21.6 mm×9200 mm anchor cables can effectively reduce the stress concentration degree of the surrounding rock and slow down the development and damage of the plastic zone.After the on-site applications,the normal mining of the working face is realized.

关 键 词：回采工作面 顶板空巷 煤层空巷 数值模拟 支护方案 

分 类 号：TD353[矿业工程—矿井建设]