采矿与安全工程学报2016，Vol.33Issue(4)：630-635,6.DOI:10.13545/j.cnki.jmse.2016.04.010
深埋复杂不规则孤岛工作面冲击矿压机制研究
Rock burst mechanism analysis on deep irregular island face
摘要
Abstract
To study the influence of deep irregular island face mining on rock burst, based on the spa-tial structure theory, the characteristics of overburden structure above island face 3112 have been ana-lyzed in this paper, and the effect of large scale fracturing on the coal and rock has also been analyzed. Also the dynamic information monitored by microseismic monitoring system during roadway excava-tion has been added for the dynamic evaluation of rock burst risk at the working face. Meanwhile, through theoretical analysis and numerical simulation, the mechanism of rock burst induced by static and dynamic combined load in island pillar coal face has been analyzed. Based on energy conservation law, the release and conversion of the energy at the moment of the key strata fracture have been studied. Subsequently, the influence law of different mining scale effect on island pillar burst has been studied with the method of numerical simulation. The greater the mining scale is,the higher the risk of rock burst will be. Finally, the technologies in controlling rock burst have been developed for island face based on the mechanism. The engineering application has presented that strong tremors can be reduced by releasing pressure through large diameter drilling and break-tip blast in deep hole.关键词
孤岛工作面/冲击矿压/“T”型覆岩结构/动态评估/数值模拟Key words
island face/rock burst/“T” strata/dynamic evaluation/numerical simulation分类
矿业与冶金引用本文复制引用
朱广安,窦林名,刘阳,苏振国,李慧..深埋复杂不规则孤岛工作面冲击矿压机制研究[J].采矿与安全工程学报,2016,33(4):630-635,6.基金项目
国家重点基础研究专项(973)项目(2010CB226805)；国家自然科学基金和神华集团有限公司联合项目(51174285)；煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM10X05)；江苏高校优势学科建设工程项目(PAPD) （973）
