动压影响区松软留顶煤巷道支护技术研究  

Research on Support Technology for Soft Top Coal Roadway in Dynamic Pressure Affected Zone

作　　者：敖翠云 AO Cuiyun

机构地区：[1]贵州省六盘水市盘州市能源局,贵州六盘水553537

出　　处：《中国矿山工程》2024年第4期38-42,共5页China Mine Engineering

基　　金：国家自然科学基金面上项目(52274150)。

摘　　要：西南地区某矿为松软煤层,巷道留顶煤,放顶产生的动压导致临近掘进巷道围岩变形严重。针对以上问题,采用多场耦合模拟软件模拟动压影响下围岩应变演化规律,结合现场离层仪观测数据综合分析可知,原支护措施在动压影响下存在围岩失稳危险性。通过施工卸压孔控制动压扩散到支护区域,U型钢+管棚支护提高整体支护强度。防治措施实施完成后,动压影响的巷道围岩最大位移量为50mm,整体变形比较小。防治措施有效控制了动压影响下软煤留顶煤巷支护强度不足的问题。A mine in Southwest China is a soft coal seam,the mining face is a comprehensive release working face,the roadway leaves the top coal,and the dynamic pressure generated by the release of the top leads to serious deformation of the surrounding rock of the adjacent tunneling roadway.In view of the above problems,the multi-field coupling simulation software was used to simulate the strain evolution law of the surrounding rock under the influence of dynamic pressure,and combined with the comprehensive analysis of the on-site observation data of the off-loading instrument,it is known that the original support measures have the danger of surrounding rock instability under the influence of the dynamic pressure,and the reasons leading to the instability of the surrounding rock are analyzed,and preventive and curative measures are formulated.Through the construction of pressure relief holes to control the spread of dynamic pressure to the support area,U-beam steel+pipe shed support to improve the overall support strength.After the implementation of preventive measures,the maximum displacement of the tunnel perimeter rock affected by dynamic pressure was 50mm,and the overall deformation was relatively small.The preventive measures effectively control the problem of insufficient support strength of the soft coal roadway under the influence of dynamic pressure.

关 键 词：动压 多场耦合模拟 卸压孔 U型钢+管棚 

分 类 号：TD325[矿业工程—矿井建设]