断层影响下覆岩破坏规律研究  

Study on Failure Law of Overlaying Strata under Influence of Faults

作　　者：尹立明[1] 郭惟嘉[1] 尹增德[1] 

机构地区：[1]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2009年第4期59-63,共5页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(50874070);国家自然科学基金重点项目(50874070);教育部博士点基金项目(20080424004);山东省自然科学基金项目(Y2008F01)

摘　　要：应用ANSYS有限元分析软件和相似材料模拟实验,分析在采动和断层影响下覆岩变形破坏和矿压分布规律。结果表明:在采动影响下断层"活化",断层带及其影响范围内的岩体破碎,表现为周期断裂步距小,冒落带高,尤其是断层下盘,顶板稳定性差。通过断层后,顶板岩体中支撑力减小,比无断层存在的情况低。但断层对于上覆岩层导水裂隙带的高度和范围的影响不明显。The authors analyzed the laws of deformation and failure of overlaying strata and the distribution of mine pressures under the influence of faults and mining activities by applying the ANSYS finite element software and similar materials simulation test. The results indicated that the faults were ＂activated＂ by coal mining, and the rockmass in fault zone and its influential range was broken, and the distance of periodic weighting decreased and the caving zone increased, particularly, the roof stability in the footwall of fault seemed to be weakened. The supporting force of the rock mass in roof decreased after passing the fault, and it was lower than that without the existence of fault. The height and scope of water flowing fractured zone in overlying strata were not influenced by the existence of fault evidently.

关 键 词：断层 开采 覆岩破坏 数值计算 相似模拟试验 

分 类 号：TD325[矿业工程—矿井建设]