采煤沉陷与地质不连续界面关系的数值实验研究  

Coal Mining Subsidence and Geological Discontinuity of the Interface between Numerical Experiments

作　　者：吕婷婷[1] 杜荣军[2] 

机构地区：[1]陕西省煤田地质局,陕西西安710054 [2]西安科技大学地质与环境学院,陕西西安710054

出　　处：《煤》2011年第8期10-12,31,共4页Coal

摘　　要：为查明地质不连续界面的类型对地表下沉特征的影响程度,根据陕西某矿区主采煤层覆岩结构及其物理力学性质资料,采用FLAC3D软件建立了数值模型,研究了节理倾角、断层落差对地表下沉的影响。结果表明:地质不连续界面类型不同,对采煤沉陷的影响不同,节理发育时,将加剧采煤沉陷,而落差小于8 m的小型隐伏断层在一定程度上减弱了采煤沉陷;不连续界面类型将改变地表下沉曲线形态,节理发育时,地表下沉曲线将呈非对称状,而断层发育时,则为对称状;倾角小于30°,或者大于70°的节理,或者落差大于8 m的断层将对地表下沉产生较大的影响。Interface to identify the type of geological discontinuities on the eXtent of the impact of surface subsidence characteristics,according to the main coal mine in Shaanxi,an overlying layer of rock structure and its physical and mechanical properties of materials,the use of FLAC 3D software to build a numerical model to study the joint angle,fault gap on the impact of surface subsidence.The results showed that： geological discontinuity interface types,the impact of coal mining subsidence different,joint development,it will increase coal mining subsidence,and the gap is less than 8 m small buried fault to some extent,weakened the coal mining subsidence;interface type will not change the continuous surface subsidence curve shape,joint development,the surface subsidence curves show a non-symmetrical,and fault development when compared with symmetrical;angle less than 30 °,or greater than 70 ° of the joints,or the gap is greater than 8 m of the fault surface subsidence will have a greater impact.

关 键 词：节理倾角 断层落差 采煤沉陷 影响机理 

分 类 号：TD325[矿业工程—矿井建设]