标题：Analysis on Floor Failure under High Water Pressure
作者：Sun Wenbin; Guo Weijia; Liu Weitao; Zhu Xia
作者机构：[Sun Wenbin; Guo Weijia; Liu Weitao; Zhu Xia] Shandong Univ Sci & Technol, Key Lab Mine Disaster Prevent & Control, Qingdao 266590, Peoples R China.
会议名称：3rd International Workshop on Mine Hazards Prevention and Control
会议日期：NOV 19-21, 2013
来源：3RD INTERNATIONAL WORKSHOP ON MINE HAZARDS PREVENTION AND CONTROL
关键词：high water pressure; mechanical model; failure criterion; water inrush; position
摘要：The water inrush disaster in the coal mine occurred frequently with different mechanisms for years. As the mine was reaching into deep,the pressure of confined water became more and more high, which had an increasing effect on floor strata and the intensity and frequency of water inrush accident. From the viewpoint of mechanics, this paper was based on the theory of "Down Three Zone" and key stratum, mechanical model under high water pressure was built. By analyzing these mechanical models,the criterion of failure mechanism of the apron slabs was obtained. Then the stability problem of floor consisted of single lithology and different lithology was studied. At the same time, the first upper and lower destructive position and confined water were got according to the moment of aquifuge.