基于FLAC3D和SURFER的矸石充填开采沉陷数值模拟

应用FLAC3D,SURFER8对矸石充填开采后的地表移动情况进行了预计,通过与概率积分法的预计结果进行对比,发现使用FLAC3D进行模拟与概率积分法结果比较接近。但是前者是以实际钻取煤岩物理力学参数为计算依据,避免了使用概率积分法预计时需要进行确定繁杂的参数(如等价采厚、主要影响角等)的问题,为矸石充填开采沉陷预计及工程决策探求了一种高效简捷的方法。

Exploration of Numerical Simulation on the Mining Subsidence of the Gangue Backfill Based on FLAC3D and SURFER

FLAC3D &; SURFER8 were applied to forecast the surface movement after gangue backfill mining. Comparing with the results of probability integration method，it is found out that the results of FLAC3D are so closer to the results of the probability integration method. However, the former is based on the physical and mechanical parameters calculated by actual drilling of coal and rock, which can avoid the problems in complex parameters determination with the probability integration method (such as the equivalent mining thickness, main influencing angle). It brings a simple and efficient way of gangue backfill mining subsidence forecast and engineering decision-making.