千米深井矸石充填开采地表沉陷规律研究

Ground subsidence induced by solid backfill mining in mine with depth over 1000 m

针对千米深井矸石充填开采的地表沉陷问题,采用Flac3d软件建立数值计算模型,研究了该采区不同开采范围,不同充实率条件下的地表沉陷规律。研究表明,充实率为80%时,随工作面的推进,地表沉陷参数值逐渐增大,但增量逐渐减小;但推进距离为800m时,随充实率的提高,下沉值、倾斜、曲率、水平移动和水平变形等参数逐渐减小,且减小量逐渐增大。

In order to modify surface subsidence problem, authors used software Flac3dand did research on surface subsidence law of different mining range and filling rates. The results show that with the working surface advancing, the surface subsidence parameters gradually increase, but the increment decreases gradually with 80% fill rate.When the distance is 800m, the surface subsidence decreases with the filling rate increasing.The parameters such as sink value, tilt, curvature, horizontal movement and horizontal deformation gradually decrease, and the decrease gradually increases.