综放开采条件下煤层回采巷道围岩破坏分析及控制  

Research on the analysis and control technology of perimeter rock damage of coal bed back-mining roadway under the condition of generalized mining

作　　者：戎华峰 RONG Huafeng(Shanxi Coal International Energy Group Corporation,Taiyuan 030000,China)

机构地区：[1]山煤国际能源集团股份有限公司,山西太原030000

出　　处：《煤矿现代化》2025年第3期138-142,共5页Coal Mine Modernization

摘　　要：综放开采条件下巷道断面大,巷道围岩变形和应力演化复杂,为提高回采巷道围岩稳定性,以塔山煤矿主采的3~5煤层厚度14.7 m的5110回采巷道为例,对围岩变形、锚杆和锚索承载、离层进行监测和分析,通过围岩变形监测,获得了巷道在煤层综放开采条件下支护结构的受力特征;基于相似材料模拟分析了回采巷道失稳过程,并在回采巷道进行了现场试验。监测结果表明:工作面前方试验巷道收敛面积明显减小,两帮最大位移不超过428 mm,顶板最大沉陷不超过663 mm。The roadway section is large and the deformation and stress evolution of the roadway perimeter rock is complicated under the comprehensive mining condition,in order to improve the stability of the perimeter rock of the back-mining roadway,take the 5110 back-mining roadway with the thickness of 14.7 m of the 3~5 coal seams of the main coal seam of the Tashan Coal Mine as an example,and carry out the monitoring and analysis on the deformation of the perimeter rock,the bearing of the anchor rods and the anchors,the separation of the layer,and through the monitoring of the deformation of the perimeter rock,the support structure of the roadway in the coal seam under the comprehensive mining conditions has obtained the force characteristics.The force characteristics of the support structure of 5110 roadway under the conditions of integrated mining of coal seams were obtained through the monitoring of the surrounding rock deformation;the destabilization process of the back-mining roadway was simulated and analyzed based on the similar materials,and a field test was carried out in the roadway.The monitoring results show that:the convergence area of the test roadway in front of the working face is obviously reduced,the maximum displacement of the two gangs does not exceed 428 mm,and the maximum subsidence of the roof plate does not exceed 663 mm.

关 键 词：煤层 回采巷道 故障特征 控制技术 

分 类 号：TD323[矿业工程—矿井建设]