沿空掘巷小煤柱稳定性分析  

Analysis on Stability of Small Coal Pillars in Gateway Driving Along Goaf

作　　者：刘飞[1,2] 花锦波[1,2] 神文龙[1,2] 

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：《煤炭工程》2014年第5期18-20,23,共4页Coal Engineering

基　　金：长江学者和创新团队发展计划资助(IRT1084);国家重点基础研究发展计划资助(2011CB201200)

摘　　要：文章采用数值计算软件FLAC3D,研究了不同煤柱宽度及锚杆支护强度对沿空留巷侧小煤柱稳定性及掘巷巷道围岩变形的影响,得出煤柱宽度是影响煤柱稳定性与巷道围岩变形的决定性因素,高系统支护强度能有效地控制巷道围岩变形的结论。同时,以朱集矿沿1111(1)工作面轨道平巷为工程背景,得出:煤柱宽度为3m时,煤柱内垂直应力集中系数低,应力集中影响范围小,煤柱与掘巷巷道变形量最小,稳定性最好。在此基础上确立的高强度锚杆支护方案,成功保持了小煤柱的稳定性并控制住掘巷阶段巷道围岩的大变形。FLAG^3D was applied to study the influence of coal pillar width and different anchoring strength of rock bolts on the stability of small coal pillar along the gob - side entry retaining and the deformation of the surrounding rock in driving tunnel, drawing the conclusion that the width of the coal pillar is the decisive factor, and the deformation of surrounding rock can be effectively controlled with high system support strength. According to the engineering practice of the 1111 （ 1 ） working face level roadway in Zhuji coal mine, the stability of coal pillar and roadway is best with 3m wide coal pillar, the vertical stress of the coal pillar is low with a small influence range and small deformation of the coal pillar and roadway. The high strength bolt supporting scheme was determined based on the study, the stability of coal pillar and the big deformation of driving tunnel were successfully controlled.

关 键 词：沿空留巷 煤柱宽度 沿空掘巷 数值模拟 锚杆支护 

分 类 号：TD822.3[矿业工程—煤矿开采]