叠加支承压力下松软煤层巷道支护技术  

Support Technology of Soft Coal Seam Roadway Under Superimposed Abutment Pressure

作　　者：郑建彬[1] 谢文兵[2] 王其洲[1,2] 王兴开 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《煤矿安全》2015年第8期124-127,共4页Safety in Coal Mines

基　　金：煤炭资源与安全开采国家重点实验室自主研究课题基金资助项目(SKLCRSM08X01)

摘　　要：针对象山煤矿临近工作面采空区侧向支承压力叠加作用下的巷道支护难题,利用数值模拟和现场试验,围绕叠加支承压力作用下松软、破碎煤层巷道的围岩变形规律,提出强预紧力全长自攻锚杆+帮部结构补强支护技术。结果表明:21303和21502工作面采空区侧向支承压力发生明显的叠加作用,21503回风巷距离叠加支承应力峰值约10 m,巷道垂直应力为20.7 MPa,应力集中系数1.41;巷道两帮围岩位移明显大于顶底,整体位移场表现出明显的非均匀性。In order to solve the support difficult problem of roadway under superimposed abutment pressure of adjacent mining goaf in Xiangshan Mining Area,the numerical simulation software of FLAC^2 D and field test are applied. According the laws of the deformation of roadway under superimposed abutment pressure of adjacent mining goaf,we provide the support technology of pre- tightening total length self- drilling bolt ＋ two sides structure reinforcing supporting technology. The result shows that the superimposed abutment pressure in mining goaf of 21303 and 21502 coal faces,and the distance between the ventilation roadway of 21503 coal face and peak value of superimposed abutment pressure is 10 m. The vertical stress is 20. 7 MPa in the area of the ventilation roadway,and the stress concentration factor is 1. 41. The whole displacement field is inhomogeneous to some extent,and the displacement of laneway ＇s two sides is much bigger than roof and floor.

关 键 词：侧向支承压力 破碎煤层 不均匀变形 应力集中系数 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]