工作面过老巷受力变形数值模拟研究  

Numerical Simulation Study on Stress Deformation of Old Roadway in Working Face

作　　者：魏启明 杨宗泉 王虎 张海龙 胡亚军 刘玉德[2] Wei Qiming;Yang Zongquan;Wang Hu;Zhang Hailong;Hu Yajun;Liu Yude(Shicao Village Coal Mine of Ningxia Coal Industry Company,CHN Energy,Ningxia,750000;School of Mining Safety,North China University of Science and Technology,Hebei,065201)

机构地区：[1]国家能源集团宁夏煤业公司石槽村煤矿,宁夏750000 [2]华北科技学院矿山安全学院,河北065201

出　　处：《当代化工研究》2023年第23期30-32,共3页Modern Chemical Research

摘　　要：以工作面过老巷为研究对象,采用FLAC3D数值模拟,分析回采对老巷的位移与应力影响程度。研究结果表明:(1)当工作面推进至距离老巷90m范围外,老巷应力位移变化极小;距离老巷90m范围内,变形速率陡增。(2)工作面过老巷期间,老巷(主巷与煤房)两帮位移量由小于顶底板位移量转为大于顶底板位移量,老巷围岩变形主控因素由地应力转为工作面动压。(3)靠近工作面一侧煤房所受的围岩变形大于远离工作面一侧的煤房,需将靠近工作面一侧的煤房的支护进行加固。(4)进行了工程实测,验证了模拟的准确性;模拟方法可为同条件开采提供参考。Taking the working face passing through the old roadway as the research object,FLAC3D numerical simulation was used to analyze the degree of influence of mining on the displacement and stress of the old roadway.The research results indicate that:(1)when the working face advances beyond a distance of 90 m from the old roadway,the displacement of the old roadway changes very little;Within a range of 90 m from the old alley,the deformation rate sharply increases.(2)During the period when the working face passes through the old roadway,the displacement of the two sides of the old roadway(main roadway and coal house)changes from less than the displacement of the roof and floor to greater than the displacement of the roof and floor.The main controlling factor for the deformation of the surrounding rock of the old roadway(coal house)changes from geostress to dynamic pressure of the working face.(3)The surrounding rock pressure on the coal room near the working face is greater than that on the coal room far away from the working face,and the support of the coal room near the working face needs to be reinforced.(4)Engineering measurements were con-ducted to verify the accuracy of the simulation;The simulation method can provide reference for mining under the same conditions.

关 键 词：工作面过老巷 主巷与煤房 FLAC模型 老巷变形程度 

分 类 号：TD823.9[矿业工程—煤矿开采]