采煤沉陷对地表建筑群影响的FLAC3D模拟研究  

FLAC3D Simulation Research of the Impact of Coal Mining Subsidence on Surface Building Complexes

作　　者：宗翔[1] 樊欣 ZONG Xiang;FAN Xin(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2022年第4期7-14,共8页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51674006)。

摘　　要：为研究煤炭开采过程中地表沉降规律及对邻近建筑群的影响,以潘一矿1551(1)工作面为研究对象,利用FLAC3D有限差分软件建立三维数值模型,沿煤层走向每开挖50m计算29步的方式对11-2煤层进行了模拟开采,分析了分别推进350m、700m、1050m、1450m的开采进尺条件下的地表移动规律,并在模型的表面沿建筑群的外围四周布置6个监测点来监测该建筑群的位移值,得到了采空区的地表移动、变形规律和对邻近建筑群的破坏规律并结合建筑群的破坏特征进行综合对比分析。研究结果表明:煤炭开采后位于采空区上部形成椭圆形的沉降盆地,其地表最大下沉量为65cm,地表移动及变形对建筑群产生拉裂、沉降、倾斜的典型损坏,建筑群的损坏与煤炭开采具有高度的相关性,研究结果可为建筑物下采煤沉陷的预测和维修及加固提供科学的依据。In order to study the surface settlement law and the influence on the neighboring buildings during the coal mining process,a three-dimensional numerical model was established by using FLAC3D finite difference software to study the 1551(1)working face of Pangyi Mine,the 11-2 coal seam was simulated by calculating 29 steps for every 50 meters of excavation along the coal seam direction and the surface settlement laws under the conditions of 350 meters,700 meters,1050 meters,1450 meters of advance were analyzed respectively.Since six monitoring points were arranged on the surface of the model along the perimeter of the building complex,the surface movement,the deformation law and the damage law to the neighboring building complexes were obtained,and compared and analyzed with the damage characteristics of the building complexes.The result showed that the maximum subsidence of the subsidence basin formed after coal mining was 65cm and the surface movement and deformation would produce damages to the building complex by pulling,settling and tilting,which provided a scientific basis for the prediction of coal mining subsidence under the buildings and their maintenance and reinforcement.

关 键 词：煤炭开采 FLAC3D 有限差分 地表沉降 沉降盆地 

分 类 号：TU375[建筑科学—结构工程]