摘要
大直径钻孔是防治冲击地压的主要手段之一,掌握其卸压效果检验技术有助于对施工参数进行设计和优化。从煤体应力、能量和冲击倾向等角度出发,分析了大直径钻孔的卸压原理;从施工角度考虑,分析了大直径钻孔卸压效果的主要影响因素;提出了以电磁波CT探测为技术手段对大直径钻孔卸压效果进行区域检验。研究及探测结果表明,大直径钻孔通过调节压力、耗散能量和降低冲击属性达到卸压目的;煤层强度、钻孔直径和间距是卸压效果的主要影响因素;通过确定煤体中电磁波吸收系数能够良好地反映出钻孔区域的卸压效果,是一种有效的检验技术手段。
Large diameter drilling hole was one of the main method to rock burst prevention,pressure relief verified technology was contributed to construction parameters design and optimization. From some view of coal body strain,energy and impact tendency,pressure relief with large diameter drilling hole was analyzed,from construction view,the main influence factors were also analyzed. Large diameter pressure relief results was detected regional by electromagnetic wave CT. The results showed that pressure relief aim could be arrived by pressure adjustment,energy dissipation and reduce impact property. Coal seam strength,diameter and interval were all the main influence factors,pressure relief could be reflected by electromagnetic wave absorption coefficient determination in coal seam,and it is an effectively inspection technique.
作者
秦子晗
QIN Zi-han(Coal Mining ＆ Designing Department,Tiandi Science ＆ Technology Co.,Ltd.,Beijing 100013,China;Mining Institute,China Coal Research Institute,Beijing 100013,China)
出处
《煤矿开采》
北大核心
2018年第4期77-80,共4页
Coal Mining Technology
基金
国家重点研发计划(2016YFC0801403
2017YFC0804204)
国家自然科学基金项目(51574149)
关键词
大直径钻孔
卸压机理
效果检验
电磁波CT
吸收系数
large diameter drilling hole
pressure relief
results verified
electromagnetic wave CT
absorption coefficient
