“三软”厚煤层顶底板破坏特征的数值模拟  

Numerical Simulation of Destruction Features of Roof and Floor in "Three Soft" Thick Coal Seam

作　　者：张凤杰[1] 高召宁[1] 孟祥瑞[1] 

机构地区：[1]安徽理工大学,安徽淮南232001

出　　处：《煤矿安全》2013年第2期64-66,共3页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51074003;51074005);国家自然科学基金委员会与神华集团有限公司联合资助项目(51174255);安徽省优秀青年科技基金资助项目(10040606Y31);中国博士后科学基金资助项目(2011M501037)

摘　　要：淮南矿区"三软"煤层开采条件复杂。在"三软"6 m厚煤层一次采全高过程中,运用计算机FLAC数值模拟软件系统分析了随着工作面推进距离的增加,顶底板的垮落特征。工作面刚开始推进时,顶板的垂直位移范围要比底板大,但是底板的垂直位移最大值要大于顶板的垂直位移最大值。随着工作面的不断推进,顶板的垂直位移最大值逐渐接近并大于底板的垂直位移最大值,当工作面推进30 m时,顶底板的垂直位移相接近。现场生产时,应加强工作面前方煤壁的应力监测监控,防止煤壁大面积片帮,前期还应该注重底板的防治。The conditions of three soft coal seam in Huainan Mining Area are complex. During the process of mining overall heighl at one times in three soft thick coal seam （6 meters） , using FLAC numerical simulation software systematically analyses the caving char-acteristic of the roof and floor with tile increase of face advacing distance. As the working face just begins to advance, the range of roof vertical displacement is bigger than floorg, but the maximum is less. As mining goes on, the maximum of roofg vertical displacement is gradually close and greater than floorg, when the working face advances to 30 m, the maximum is roughly equal. Workers should strengthen the monitoring and controlling for the coal wall in front of the working face to prevent the large area wall caving. Earlier stage, prevention and control of the floor still should be noticed.

关 键 词：三软煤层 数值模拟 工作面推进 顶底板破坏 

分 类 号：TD325[矿业工程—矿井建设]