回采工作面中间巷围岩稳定性研究  

Study on Surrounding Rock Stability of Middle Lane in Mining Face

作　　者：袁芳[1,2,3] 牟宗龙 杨景[1,2,3] 曹京龙 杨博飞 YUAN Fang;MU Zonglong;YANG Jing;CAO Jinglong;YANG Bofei(Laboratory of Mine Earthquake Monitoring and Prevention in Jiangsu Province,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Coal Resources&Safe Mining,China University of Mining and Technology,Xuzhou 221116,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学江苏省矿山地震监测工程实验室,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 [3]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤矿安全》2020年第2期202-207,212,共7页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2016YFC0801408);江苏省高校优势学科建设工程资助项目(PAPD);煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM16X02).

摘　　要：采用理论分析和数值模拟方法,研究了中间巷受采动影响下应力场、位移场及塑性区分布特征。分析了不同时步下中间巷及工作面塑性区分布规律、中间巷应力场分布特征及顶底板位移响应。研究结果表明:中间巷周围煤岩体支承压力与沿空巷道和中间巷所夹煤体的宽度成反比,且随着中间巷与沿空巷道的夹角的变化而变化。中间巷在45°时巷道顶底板变形量最小,135°时帮部峰值应力集中系数最小。模拟塑性区结果显示,工作面实体煤以剪切破坏为主,而煤柱则以拉伸破坏为主。2种不同状态的塑性区体积在150°时最小,但与135°相差不大。结合理论及数值模拟分析,中间巷应以135°为最优角度。In view of theoretical analysis and numerical simulation,the distribution characteristics of stress field,displacement field and plastic zone in the middle lane affected by mining are studied.The distribution law of plastic zone,stress field and displacement response of roof and floor in middle lane and working face under different steps are analyzed.The results show that the abutment pressure of coal and rock mass around the middle lane is inversely proportional to the width of the coal mass between the gob-side lane and the middle lane,and it varies with the angle between the middle lane and the gob-side lane.The deformation of roof and floor is the smallest when the middle lane is 45 degrees,and the peak stress concentration factor is the smallest when the lane is 135 degrees.The results of simulated plastic zone show that shear failure is the main failure mode of solid coal in working face,while tensile failure mode of coal pillar is the main failure mode.The volume of plastic zone in two different states is the smallest at 150 degrees,but it is not much different from 135 degrees.Comprehensive analysis shows that the optimum angle of middle lane is 135 degrees.

关 键 词：中间巷 数值模拟 应力场 位移场 塑性区 

分 类 号：TD322.4[矿业工程—矿井建设]