采动影响下采空区覆岩破坏变形规律数值模拟研究  

Numerical Simulation of Gob Overlying Strata Deformation-failure Law Induced by Excavation

作　　者：王沙沙 魏久传[2] 宋宝来 WANG Shasha;WEI Jiuchuan;SONG Baolai(Longyan University,Longyan,Fujian 364000,China;Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]龙岩学院,福建龙岩364000 [2]山东科技大学,山东青岛266590

出　　处：《龙岩学院学报》2019年第2期50-55,共6页Journal of Longyan University

基　　金：福建省科技厅自然科学基金项目(2017J01661);福建省教育厅中青年项目(JAT160486);龙岩学院博士科研启动基金项目(LB2014009);龙岩学院国家基金培育项目(LG2014016);龙岩学院百名青年教师攀登项目(LQ2016007)

摘　　要：为了探究梅花井煤矿2~#煤采空区覆岩变形破坏规律及导水裂隙带高度,利用FLAC^(3D)建立了数值模型,分别对开采50～400 m的各阶段进行了模拟。结果表明:顶板岩层变形破坏形态一般呈马鞍形;顶板附近岩层若存在微裂隙,裂隙两端就会出现应力集中现象,此类区域内的岩石很容易发生跨落。2~#煤顶板导水裂隙带最大发育高度值约为73 m。研究结果对2~#煤的安全开采提供了重要依据。In order to study overlying strata deformation-failure law induced by No.2 coal excavation,the numerical model was established by FLAC 3D software. Simulation process shows that overlying strata failure is usually in the form of a saddle with high stress concentration on both sides and low in the middle. If there are micro-cracks in the rocks near the roof,two constraint ends are most likely to emerge failure for the maximum stress. The height of the water flowing fractured zone is about 73m. Those results provide rational and feasible reference for coal mining.

关 键 词：覆岩变形破坏 导水裂隙带 FLAC3D 数值模型 

分 类 号：TD325[矿业工程—矿井建设]