高地应压力下沿空掘巷窄煤柱留设分析及其控制技术  

Analysis And Control Technology Of Narrow Coal Pillar along Goaf under Pressure In High Ground

作　　者：张俊文[1] 钟帅[2] 郭小红[2] ZHANG Junwen;ZHONG Shuai;GUO Xiaohong(Lanzhou Resources and Environment Voc-Tech College,Lanzhou 730020,China)

机构地区：[1]兰州资源环境职业技术学院采矿教研室,甘肃兰州730020 [2]兰州资源环境职业技术学院,甘肃兰州730020

出　　处：《煤矿现代化》2021年第4期141-144,147,共5页Coal Mine Modernization

基　　金：甘肃省教育厅2018年科研项目基金(2018A-217);甘肃省教育厅2020年高等学校科研项目创新基金(2020A-224)。

摘　　要：为研究高地应压力下沿空掘巷窄煤柱合理尺寸并开展有效支护设计,以甘肃魏家地煤矿1302工作面为研究对象,利用物理模拟手段,分析该工作面不同煤柱尺寸时的应力分布规律,确定合理窄煤柱尺寸,并结合现场矿压观测及理论分析,探究回采巷道围岩应力分布特征,提出支护方式。试验结果表明:该工作面井巷来压显现较剧烈,沿空掘巷煤柱尺寸设为6.5 m,采用预应力全长树脂锚固锚杆加强巷内支护,并提出设计参数及围岩控制对策。In order to study the reasonable size of narrow coal pillar and carry out effective support design under high ground pressure,this paper takes 1302 working face of Weijiadi Coal Mine in Gansu Province as the research object,analyzes the stress distribution of different coal pillar sizes in this working face by means of physical simulation,determines the reasonable narrow coal pillar size,and probes into the stress distribution law of surrounding rock of mining roadway in combination with field pressure observation and theoretical analysis.Finally,the supporting mode is put forward.The test results show that the incoming pressure of shaft and roadway is violent,the size of coal pillar is set to 6.5 meters,the prestressed full-length resin anchor bolt is used to strengthen the support in roadway,and the design parameters and surrounding rock control countermeasures are put forward.

关 键 词：沿空掘巷 窄煤柱 围岩控制 相似模拟 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]