黄土山区矿井地表移动变形数值模拟

黄土山区地形条件复杂,煤层地下开采引起的地表移动变形规律与平原区不同。文中以最具代表性的铜川矿区为例,运用有限差分法数值计算软件(FLAC3D)研究了黄土山区地下煤层开采引起的地表移动变形的规律。研究表明,黄土山区地表移动变形除了有向采空区方向移动的位移分量外,还有向山坡下方移动的位移分量,地下煤层顺坡向开采可在一定程度上减缓和控制山区地表采动损害。

Numerical simulation on ground movement and deformation of mine ground in loess hilly area

The topographic condition is complicated in loess hilly area,and the laws of the ground movement and deformation caused by the mining of the underground coal seam is different from those in the Campagna.The paper takes Tongchuan mining area as a representative example.The laws of ground movement and deformation in loess hilly area caused by the mining of underground coal seam are studied by means of the finite difference method computation software(FLAC3D).The study indicates that the ground movement and deformation not only characterizes the displacement component moving toward the gob of coal mine,but also the displacement component moving downward the hillside.The mining of the underground coal seam in the same direction as that of the slope can be retarded,to some extent,and even control the ground movement and deformation caused by mining.