近距离不规则采空区下综放煤巷分区控制研究  

Study on sub-regional control of fully mechanized top-coal caving roadway under close irregular goaf

作　　者：刘华博 孟凡净 花少震 王浩 LIU Huabo;MENG Fanjing;HUA Shaozhen;WANG Hao(School of Mechanical Engineering,Henan Institute of Technology,Xinxiang 453003,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南工学院机械工程学院,河南新乡453003 [2]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《煤矿安全》2023年第2期113-120,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51904091);河南省高等学校重点科研资助项目(21A130001)。

摘　　要：为了解决近距离煤层巷道围岩大变形破坏的控制难题,以小峪煤矿不规则采空区下近距离厚煤层综放煤巷为工程背景,将试验巷道划分为普通段、采空区下及残留煤柱下等多个区域,通过地质雷达探测、钻孔窥视、理论计算、数值模拟等方法对比分析了不同区域煤巷围岩变形破坏特征。结果表明:近距离不规则采空区下综放煤巷围岩塑化破坏范围为2.15 m;工作面超前剧烈采动影响距离为26 m;综放煤巷回采帮松动范围大于实体煤帮0.5 m。基于此,提出了普通区煤巷常规支护及采空区下与残留煤柱下煤巷槽钢锚索加强支护的分区联合控制技术,工程实践表明分区组合支护技术显著控制了围岩大变形,保障了综放工作面的安全回采。In order to solve the control problems of large deformation of roadway surrounding rock in close coal seams, taking the fully mechanized top-coal caving roadway in close thick coal seams under irregular goaf of Xiaoyu Coal Mine as the engineering background, the test roadway is divided into ordinary section, under the goaf and under the residual coal pillar. The failure characteristics of surrounding rock of coal roadway in different areas are compared and analyzed by geological radar detection, borehole peeping, theoretical calculation and numerical simulation. The results show that: the plastic zone range of fully mechanized top-coal caving roadway in close thick coal seam under irregular goaf is 2.15 m;the influence distance of advanced and violent mining in the coal face is 26 m;the loosening range of the mining side of the roadway is 0.5 m larger than that of solid coal. Based on this, a sub-regional combined control technology of conventional support in general area and strengthened support of channelsteel anchor cable under the goaf and under the residual coal pillar is proposed. The engineering practice shows that the combined support technology can effectively control the large deformation of surrounding rock, and it ensures the safe mining of fully mechanized top-coal caving face.

关 键 词：近距离厚煤层 不规则采空区 非对称破坏 残留煤柱 分区联合控制 

分 类 号：TD322[矿业工程—矿井建设]