钻孔施工诱发煤与瓦斯突出的机理研究  

Study of the mechanism of coal and gas outburst induced by drilling

作　　者：欧建春[1,2] 王恩元[1,2] 徐文全[2] 李忠辉[2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2012年第5期739-745,共7页Journal of China University of Mining & Technology

基　　金：中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM09X01);国家自然科学基金项目(40804070);国际科技合作项目(2008DFB70100)

摘　　要：利用自行研制的煤与瓦斯突出模拟实验装置,模拟煤矿井下钻孔施工,通过高速摄像系统对其过程进行实时监测,对喷孔过程中煤体的裂隙演化特征进行分析;从力学角度对钻孔施工时钻孔前方煤体的受力情况进行了分析,包括切向应力和径向应力;从煤体受到的振动作用角度,对钻孔施工时钻杆对煤体的振动效应进行了分析;同时对钻孔施工时孔内变形进行了监测.基于实验现象和理论分析,提出了基于钻孔施工诱发的煤与瓦斯突出耦合跃迁失稳机理.A homemade device was used to simulate an underground gas outburst during drill-ing. Real time monitoring by a high speed photographic camera was used to follow the progress of the simulation. Coal fracture during jet orifice drilling was analyzed. Both tangential and ra- dial stress was forced into the coal mass preceding the drill hole. The vibration of the drill stem on the coal mass surrounding the hole was also examined along with deformation of the interior of the hole. A theory linking coal and gas outburst to drill hole bursting is described.

关 键 词：钻孔施工 突出模拟 振动 喷孔 裂纹扩展 

分 类 号：TD713[矿业工程—矿井通风与安全]