赵固一矿厚松散层薄基岩巷道支护方案优化与实践  

Optimization and Practice of Support Scheme for Thick Loose Layer and Thin Bedrock Roadway in Zhaogu No.1 Mine

作　　者：余永强[1] 彭天祥 范利丹[1] 张程鑫 韦四江[2] YU Yongqiang;PENG Tianxiang;FAN Lidan;ZHANG Chengxin;WEI Sijiang(School of Civil Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作市454003 [2]河南理工大学能源科学与工程学院,河南焦作市454003

出　　处：《矿业研究与开发》2024年第1期132-140,共9页Mining Research and Development

基　　金：国家自然科学基金资助项目(51974104).

摘　　要：厚松散层薄基岩煤层开采是目前我国煤炭生产面临的难题之一。以赵固一矿16081上顺槽为工程背景,采用有限差分软件模拟了5种支护设计方案,通过应力、位移、塑性区3个指标对模拟结果进行分析,选出了最优支护方案,在此基础上开展了现场支护实践,并进行了巷道变形监测。结果表明,(1)“锚索网+封闭式钢架+底板锚杆+底板注浆”加强支护方案对16081上顺槽围岩的控制效果较好;监测时间为90d时,巷道顶底板的相对移近量约为80mm,两帮相对移近量约为140mm;(2)与未支护巷道相比,最优方案的围岩垂直应力峰值降低,应力峰值向浅部转移,并出现在距离两帮表面约2m处;水平应力峰值区向底板浅部转移,且主要集中在距离巷道底板中心约0.9m处;(3)与未支护巷道相比,最优方案的两帮最大变形量为21 mm,减少了约80.9%;该方案的塑性区体积仅为15.3m3,缩小了约85.6%。The mining of thick loose layer and thin bedrock coal seam is one of the problems faced by coal production in China.Taking the 16081upper crossheading of Zhaogu No.1Mine as the engineering background,five support design schemes were simulated by finite difference software.The optimal support scheme was selected after analyzing the simulation results through three indexes of stress,displacement and plastic zone.On this basis,the field support practice and the roadway deformation monitoring were carried out.The results show that:(1)the strengthening support scheme of“anchor cable net+closed steel frame+floor bolt+floor grouting”has better control effect on the surrounding rock of 16081upper crossheading.When the monitoring time is 90d,the relative displacement of the roof and floor of the roadway is about 80 mm,and the relative displacement of the two sides is about 140mm.(2)Compared with the unsupported roadway,the vertical stress peak of the surrounding rock of the optimal scheme is reduced,and the stress peak is transferred to the shallow part,which appears at about 2mfrom the surface of the two sides.The horizontal stress peak area shifts to the shallow part of the floor,mainly concentrates at about 0.9mfrom the center of the roadway floor.(3)Compared with the unsupported roadway,the maximum deformation of the two sides of the optimal scheme is 21mm,which is reduced by about 80.9%.The plastic zone volume of the optimal scheme is only 15.3m3,which is reduced by about 85.6%.

关 键 词：厚松散层 薄基岩 支护方案优化 巷道变形量 塑性区体积 

分 类 号：TD353[矿业工程—矿井建设]