工作面回采扰动影响下煤层大巷群围岩控制研究  

Research on surrounding rock control of main coal roadway group under the influence of face mining disturbance

作　　者：张虎 Zhang hu(Shaanxi Coal Industry Caojiatan Mining Co.,Ltd.,Yulin 719000,China)

机构地区：[1]陕西陕煤曹家滩矿业有限公司,陕西榆林719000

出　　处：《煤炭与化工》2024年第3期11-16,21,共7页Coal and Chemical Industry

基　　金：国家自然科学基金项目(52104091);国家重点研发计划项目(2020YFB1314002)。

摘　　要：研究余吾煤业N2105工作面回采末期阶段对其停采线前方煤层大巷群的影响,通过现场实测调研,指明了回采扰动影响将会导致煤层大巷群围岩发生不同程度的破坏,在此基础上根据UDEC3D离散元软件模拟分析得到煤柱体上方顶板致裂后能够有效地降低煤体内的垂直应力峰值,同时根据COMSOL Multiphysics 6.0仿真软件模拟分析得到最佳注浆压力值和水灰比,分别为1.0 MPa和1.5∶1。现场工业性试验阶段,在1号回风大巷内布置测站所监测的矿压数据表明,围岩两帮和顶底板收敛率均控制在5%以内,巷道围岩整体变形控制效果显著。Based on the engineering background of the impact of No.N2105 Face in the final stage of mining on the coal roadway group in front of its stop line,on-site measurement and research indicated that the impact of mining disturbance caused varying degrees of damage to the surrounding rock of the coal seam roadway group.Based on this,simulation analysis using UDEC3D discrete element software showed that the vertical stress peak in the coal body could be effectively reduced after the roof above the coal pillar cracks.At the same time,according to the simulation analysis of COMSOL Multiphysics 6.0 simulation software,the optimal grouting pressure and water-cement ratio were 1.0 MPa and 1.5:1 respectively.During the on-site industrial test stage,the monitoring data of the mine pressure by setting up a measuring station in the 1#return air roadway showed that the convergence rate of the two sides and top and bottom of the surrounding rock was controlled within 5%,and the overall deformation control effect of the roadway surrounding rock was significant.

关 键 词：采动影响 煤层大巷 顶板致裂 注浆加固 收敛量 

分 类 号：TD353[矿业工程—矿井建设]