摘要
为解决迎采对掘窄煤柱护巷围岩变形大、支护困难的问题,以高平七一煤业9104工作面运输巷为例,采用现场调研、数值模拟和工业性试验相结合的方法,对迎采对掘期间巷道围岩变形规律、煤柱尺寸及相应支护参数的确定进行了研究。结果表明:随着煤柱宽度的增加,巷道围岩变形量及煤柱内的应力分布特征呈现出明显的差异性,并基于此确定了七一煤业9104工作面运输巷合理煤柱宽度为5 m;迎采对掘动压巷道围岩位移调整过程主要集中在掘进工作面和临近回采工作面相遇前方20 m至后方100 m处,此阶段的巷道变形量约占总变形量的70.5%左右。工业性试验研究表明:5 m窄煤柱护巷及优化后的支护参数,能够有效控制巷道围岩变形,基本保证了巷道在其服务年限内的正常使用。
To solve the problem of large deformation and difficult support of surrounding rock in roadway under driven heading for adjacent advancing coal face conditions,taking the transport of 9104 working face of Gaoping Qiyi Coal Mine as an example,the deformation law of surrounding rock under driven heading for adjacent advancing coal face conditions,determination of coal pillar size and its corresponding supporting parameters were studied by the method of combining with numerical simulation and industrial test.Results indicate that with the increase of coal pillar width,the deformation of surrounding rock and the distribution of stress in coal pillars show obvious differences,and based on this,it is determined that the reasonable coal pillar width of 9104 working face in Qiyi Coal Industry is 5 m;the roadway adjustment process is mainly concentrated at 20 m to 100 m ahead of the meeting of the heading face and the adjacent stoping face,the deformation of the roadway at this phase accounts for about 70.5%of the total deformation.The industrial test shows that the deformation of roadway surrounding rock can be effectively controlled by 5 m narrow coal pillar roadway protection and optimized support parameters,and the normal use of roadway in its service life is basically guaranteed.
作者
陈晓祥
王逸良
张天
CHEN Xiaoxiang;WANG Yiliang;ZHANG Tian(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;The Collaborative Innovation Center of Coal Safety Production of Henan Province,Jiaozuo 454000,China)
出处
《煤矿安全》
CAS
北大核心
2020年第6期66-71,76,共7页
Safety in Coal Mines
基金
国家自然科学基金资助项目(U1504515,51304068)
中国煤炭工业协会指导性研究计划资助项目(MTKJ2015-251)
2017年度河南省高等学校青年骨干教师培养计划资助项目(2017GGJS055)。
关键词
迎采对掘
窄煤柱护巷
围岩控制
数值模拟
支护参数
巷道支护
围岩变形
沿空掘巷
driven heading for adjacent advancing coal face
narrow pillar retaining roadway
surrounding rock control
numerical simulation
support parameters
roadway support
surrounding deformation
gob-side entry driving
