类梯形孤岛工作面冲击危险性评价及其防治技术研究  

Rockburst Risk Assessment and Prevention Technology in Trapezoidlike Island Working Face

作　　者：魏辉 张文豪 李杰 WEI Hui;ZHANG Wen-hao;LI Jie(Department of Mining Engineering,Shanxi Institute of Technology,Yangquan 045000,China;Xishan Coal Electricity(Group)Co.,Ltd.,Taiyuan 030053,China)

机构地区：[1]山西工程技术学院采矿工程系,山西阳泉045000 [2]西山煤电(集团)有限责任公司,太原030053

出　　处：《煤炭技术》2021年第10期93-96,共4页Coal Technology

基　　金：国家自然科学基金资助项目(51674519);江苏省高等学校自然科学研究项目资助(19KJB560010)。

摘　　要：为了解决类梯形孤岛工作面在回采过程中的冲击地压问题,基于23612西工作面具体地质条件和开采技术,分析了类梯形孤岛工作面开采环境、不规则形状、断层构造、残留煤柱和遗留巷道等能够造成冲击破坏的影响因素。并通过综合指数法(W_(t)=0.42)和可能性指数诊断法(U=0.51)对冲击地压危险性进行了综合评价,认定工作面具有弱冲击地压危险,具备发生冲击地压的条件。将23612西工作面的冲击危险区域按危险等级进行了划分,并采用大直径钻孔卸压、爆破卸压等防治措施对不同等级危险区域进行了综合防控,并以钻屑法对卸压效果进行了检验,保证了工作面的安全回采。In order to solve the rockburst problem in the mining process of trapezoid-like island working face, based on the geological conditions and mining technology of 23612 west face, analyzes the impact factors such as trapezoid-like island mining environment, fault structure, residual coal pillar and remaining roadway that can cause impact damage. The risk of rockburst is evaluated by the comprehensive index method(W_(t)=0.42) and the possibility index diagnostic method(U=0.51), it is considered that the working face is in danger of weak rockburst risk and has the conditions for the occurrence of rockburst. The dangerous area of 23612 west working face is divided according to the danger level, and prevention measures such as large-diameter drilling pressure relief and blasting pressure relief are adopted for different dangerous areas, and the pressure relief effect is tested by drilling cuttings method to ensure the safe mining of working face.

关 键 词：冲击地压 类梯形孤岛 冲击危险性评价 残留煤柱 防治措施 

分 类 号：TD324[矿业工程—矿井建设]