煤层开采地表移动过程的FLAC^(3D)模拟研究  

Study on FLAC^(3D) Simulation of Surface Ground Movement Process for Underground Seam Mining

作　　者：刘玉成[1] 

机构地区：[1]毕节学院采矿工程系,贵州毕节551700

出　　处：《煤炭科学技术》2012年第5期93-95,128,共4页Coal Science and Technology

基　　金：贵州省教育厅自然科学研究资助项目(黔教科2010073);贵州省科学技术基金资助项目(黔科合J字[2012]2006号)

摘　　要：为减少现场布置大量测点来观测煤层开采地表移动全过程,采用FLAC3D软件模拟分析了煤层地下开采引起的地表移动过程,认为采用沿煤层走向方向每开挖2 m长度计算50步的方式可实现煤层的走向长壁开采,并对某一煤层进行了模拟开采,在模型的上表面经过开采中心点沿走向和倾向剖面线上共布置了36个下沉量和位移速度测点;得出主断面最大下沉量为94 mm,各监测点下沉量及位移速度与计算步数之间的关系曲线符合改进的地表移动Knothe时间函数曲线。In order to reduce large number of the measuring points in the site layout to observe the full process of the surface ground movement above the underground seam mining, the FLAC^3D software was applied to simulate and analyze the surface ground movement process caused by the seam mining in underground mine. The paper held that the 50 steps method of the length calculation per 2 m excavation along the seam strike orientation could realize the longwall strike mining of the seam. A simulation mining was conducted on a seam. There were 36 measuring points of the subsidence value and displacement speed set on the top surface of the model through the mining center along the strike and inclined cross section line. The max subsidence value of the main cross section was 94 mm as obtained. The relation- ship curve between the subsidence value and displacement of each monitoring and measuring as well as the displacement and the calculated steps could meet the curve of the surface displacement knothe time function curve to improve.

关 键 词：FLAC3D 模拟开采 地表移动 位移曲线 

分 类 号：TD325.2[矿业工程—矿井建设]