文献类型：期刊文献

中文题名：特厚煤层冲击地压重复发生的机理研究

英文题名：Mechanism of repeated rock bursts in extra-thick coal seam

作者：杨伟利[1];姜福兴[1];杨鹏[2,1];朱权洁[1];魏全德[1];王存文[1]

第一作者：杨伟利

机构：[1]北京科技大学土木与环境工程学院;[2]北京联合大学北京市信息服务工程重点实验室

第一机构：北京科技大学土木与环境工程学院,北京100083

年份：2015

卷号：37

期号：11

起止页码：2045-2050

中文期刊名：岩土工程学报

外文期刊名：Chinese Journal of Geotechnical Engineering

收录：CSTPCD;;EI(收录号：20155101695860);Scopus(收录号：2-s2.0-84949798368);北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家重点基础研究发展计划("9 7 3"计划)项目(2010CB226803);国家自然科学基金项目(51274022;51174016)

语种：中文

中文关键词：特厚煤层;冲击地压;重复冲击;应力恢复;力源

外文关键词：extra-thick coal seam; rock burst; repeated impact; stress restoration; source of force

摘要：以现场同一区域重复发生冲击地压为工程背景,通过理论分析、现场监测、数值模拟等方法研究冲击地压重复发生机理,得出如下结论:1特厚煤层重复冲击区域存在应力恢复现象,而力源作用下的特厚煤层的扩容是导致应力恢复的主要原因;2重复冲击是冲击体受到的冲击力与阻抗力多次搏弈的结果,煤体由完整状态向碎裂状态过渡过程中满足冲击力大于阻抗力的条件而发生多次冲击,直至煤体进入碎裂状态;3通过消除力源、阻止应力恢复可防止冲击地压重复发生。研究结果对防治特厚煤层冲击地压具有重要意义。
Taking the rock burst recurring in the same region as the engineering background, the mechanism of the repeated rock bursts is explored by using the methods of theoretical analysis, field monitoring and numerical simulation. The results are as follows：（1） The region with repeated rock bursts in extra-thick coal seam has stress restoration phenomenon, and the extra-thick coal seam expands under source of force is the major reason which leads to stress restoration;（2） The repeated impact is the result of competition of many times between the impact force and the impedance force of the impacted body, and rock burst occurs many times during coal body transfers from relatively complete state to fracturing state when the impact force is greater than impedance force, till the coal body fractures completely.（3） Eliminating the force and stopping stress restoration can prevent the recurrence of rock burst. The results of this study may provide a useful reference for the prevention and control of rock bursts in extra-thick coal seam.