摘要
根据冲击地压发生地点的分布特征,结合朱集矿11-2#煤层的赋存条件,对2种不同瓦斯压力条件下的冲击地压发生过程进行数值分析,研究了冲击发生过程中的煤体移动机理,并得出了煤体破裂演化图、瓦斯流动状况图及应力分布曲线图。研究结果显示:不同瓦斯压力条件下的煤体破裂失效过程基本相同;在高瓦斯压力条件下,软煤初始破裂相对比较剧烈,瓦斯流量比较高,煤壁破坏深度更大,冲击地压灾害比较严重;煤层与顶板之间的滑移可以考虑为滚动摩擦。
Based on distribution characteristics of rock burst, combining with occurrence conditions of 11 - 2 coal seam in Zhuji Mine, the occurring process of rock burst is analyzed under the conditions of two gas pressures in paper. Mobile mechanism of coal is studied when rock bust occurs, and evolution pattern of coal fracture, gas flow state pattern and stress distribution curve are obtained. The re- sults showed that coal fracture process is almost same under different gas pressures; soft coal fracture is relatively acute in initial stages under high gas pressure, i.e. higher gas flow, greater coal fracture depth, very serious rock burst; the slip can be regarded as rolling friction between coal seam and roof.
出处
《煤矿安全》
CAS
北大核心
2013年第9期1-4,共4页
Safety in Coal Mines
基金
中央高校基本科研业务费资助项目(2011A01
2011SYSJJ01
2012E1202)
国家自然科学基金资助项目(51204070)
教育部"新世纪优秀人才支持计划"资助项目距(NCET-11-0837)
河北省重点基础研究资助项目(11965629D)
关键词
瓦斯压力
冲击地压
移动机理
滚动摩擦
滑动摩擦
gas pressure
rock burst
mobile mechanism
rolling friction
sliding friction
