复杂应力条件下巷道围岩变形控制技术研究  

Research on Deformation Control Technology of Roadway Surrounding Rock under Complex Stress Conditions

作　　者：范学锋 FAN Xuefeng(Guojin Construction Group Co.,Ltd.,Jincheng 048000,China)

机构地区：[1]国晋建设集团股份有限公司,山西晋城048000

出　　处：《煤》2025年第4期48-51,74,共5页Coal

摘　　要：为了解决在煤柱内掘进巷道时表现出的应力条件复杂、围岩变形量大、巷道维修成本高等难题,以平泉煤业3号煤层复采项目中的回风大巷为例,采用FLAC^(3D)数值模拟软件进行模拟分析,对巷道断面及支护设计进行优化,提出了对实体煤巷道前后两端15 m范围内巷道采用“锚网索喷+注浆+25U型钢棚”进行支护,中间巷道采用“锚网索喷+注浆”进行支护的施工方案。在现场进行工业性试验,通过围岩移近量观测发现,采用锚网索喷支护段巷道顶板下沉量最大值为137 mm,两帮移近量最大值为115 mm.采用锚网索喷+25U型钢棚联合支护段巷道,顶板下沉量最大值为95 mm,两帮移近量最大值为52 mm.现场实践表明,该方案能够有效控制围岩变形,可保证巷道的稳定。In order to solve the problems of complex stress conditions,large deformation of surrounding rock and high maintenance cost of roadway when driving roadway in coal pillar,taking the return air roadway in the re-mining project of the No.3 coal seam of Pingquan Coal Industry as an example,FLAC~(3D) numerical simulation software was used to simulate and analyze,and the roadway section and support design were optimized.The construction scheme of "anchor net cable spray+grouting+25 U steel shed" for supporting the roadway within 15 m of the front and rear ends of the solid coal roadway,and "anchor net cable spray+grouting" for supporting the middle roadway was proposed.The industrial test was carried out on site.Through the observation of surrounding rock convergence,it was found that the maximum subsidence of the roadway roof in the bolt-mesh-cable-shotcrete support section was 137 mm,and the maximum convergence of the two sides was 115 mm.The roadway in the combined support section of anchor net cable spray+25 U steel shed is adopted.The maximum roof subsidence is 95 mm,and the maximum displacement of the two sides is 52 mm.The field practice shows that the scheme can effectively control the deformation of surrounding rock and ensure the stability of roadway.

关 键 词：自承能力 采空区 应力集中 壁后注浆 

分 类 号：TD353[矿业工程—矿井建设]