开采方案对地表移动影响的数值模拟

以淮南矿区某采区煤层开采为研究对象,采用非线性大变形FLAC程序,对不同开采方案引起的地表移动和对地面防汛堤坝的移动变形状况进行了数值模拟.结果表明,走向方向的无煤柱开采和倾斜方向煤层区段间正台阶顺序开采为最优开采方案,此时堤坝处于下沉曲线的均匀下沉区,维护工程量小,有利于巷道布置和生产接替.并获得了地表移动和变形的有关参数,为煤矿生产和堤坝的稳定加固提供了科学依据.

Numerical Simulation of Effect of Mining Scheme on Ground Movement

According to geological conditions of coal seams in Huainan mining area,the ground and dyke movement induced by different mining schemes was simulated and analyzed by using FLAC.The result shows that the strike mining without coal pillar and the sequential heading and bench mining along dip direction are preferred.In adopting these methods,the dyke is in the area with evenly subsiding,with only a small amount of engineering needed,which is favorable for roadway layout and continuous mining.In addition,we al...