构造应力与节理耦合对采煤沉陷的控制作用  

Control Effect of Tectonic Stress and Joint Coupling on Mining Subsidence

作　　者：孙学阳[1] 夏玉成[1] 杜荣军[1] 肖良[1] 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《采矿与安全工程学报》2010年第1期126-130,共5页Journal of Mining & Safety Engineering

基　　金：陕西省自然科学基金项目(2009JM5001);国家自然科学基金项目(40472104)

摘　　要：为了得到复杂地质条件下的采煤沉陷特征,提高采煤沉陷预计精度,采用FLAC3D软件模拟开挖挤压构造应力分别为自重应力的0.1,0.5,1.0,1.5,2.0倍和拉张构造应力分别为自重应力的0.005,0.01,0.05,0.1,0.5倍,节理倾角为0°,30°,60°和90°相耦合的55个模型,考察构造应力与节理耦合对采煤沉陷的影响.模拟结果表明:其他地质和采矿条件均相同的条件下,随着挤压应力的增大,地表最大下沉值减少,地表下沉盆地范围增大;拉张构造应力时的采煤沉陷特征与之相反.当构造应力不变时,随着节理倾角增大地表最大下沉值增大,下沉盆地范围减小.因此,节理倾角及拉张构造应力与采煤沉陷正相关,挤压构造应力与之负相关.For the sake of getting the characters of mining subsidence under complex geologic conditions and improving the prediction accuracy of mining subsidence,the soft of FLAC3D is used to simulate 55 models,and study the coupling effect of tectonic stress and joints on mining subsidence.In these models,the compressive tectonic stress is 0.1,0.5,1.0,1.5 and 2.0 times of the gravity respectively,the extensive tectonic stress is 0.005,0.01,0.05,0.1,and 0.5 times of the gravity,respectively;the joint inclination is ...

关 键 词：挤压构造应力 拉张构造应力 节理倾角 采煤沉陷 数值模拟 FLAC3D 

分 类 号：TD325[矿业工程—矿井建设]