FLAC^(3D)在张集煤矿开采沉陷预测中的应用分析  

Application Analysis of FLAC^(3D) on Mining Subsidence Prediction in Zhangji Coal Mine

作　　者：马彦康 杨本水[1] 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《安徽建筑大学学报》2015年第5期36-41,共6页Journal of Anhui Jianzhu University

基　　金：国家自然科学基金(51274007和51074002)联合资助

摘　　要：利用FLAC^(3D)数值分析软件,分析了高潜水的张集煤矿巨厚松散层下12171工作面重复开采对上部17278工作面移动变形区的走向位移、垂直应力分布和塑性破坏区的影响。分析结果表明:数值模拟结果与实测数据基本相符;多煤层重复采动地表下沉具有特殊性,下沉量相比于初次采动是逐渐增大的,随着重复采动次数的增加,下沉量逐渐趋于稳定;同时随着工作面累计推进距离的增加,地面沉陷范围逐渐增加,并形成塌陷盆地;两工作面顶板围岩以剪切破坏为主,局部发生拉伸破坏。The FLAC3D numerical analysis software is adopted to analyze the influence of the displacement ,vertical stress distribution and plastic failure zone on strike of the upper 17278 w orking surface movement and deformation area by 12171 w orking surface repeat mining under the Zhangji coal mine thick unconsolidated layers with high diving .The results show that the numerical simulation results are basically consistent with the observed data .The repeat mining subsidence of multiple coal seams has particularity ,and the sinking quantity is gradually increasing compared with the initial mining ,with the increase of the number of repeat mining , the subsidence tends to be stable . Meanwhile ,the range of the ground subsidence gradually increases with the increase of the working surface ,and the subsidence basin is formed . The surrounding rock on two working surface roof always due to the shear failure ,the tensile failure is happened in local .

关 键 词：煤矿工程 开采沉陷 重复采动 厚松散层 

分 类 号：TU411.01[建筑科学—岩土工程]