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为获得不同倾角煤层开采覆岩及地表移动变形规律,以鄂尔多斯煤田色连矿区8101工作面地质采矿条件为基础,采用FLAC~(3D)进行数值模拟研究。结果表明:不同倾角煤层开采时,工作面中央顶板最大垮落高度、工作面中央底板最大隆起高度与煤层倾角呈明显的多项式关系;地表最大下沉值和水平移动值随倾角的增大而增大,并呈现出三次多项式关系;开采影响传播角、上山边界角与煤层倾角呈明显的递减关系;下山边界角随煤层倾角增大,先增大后减小,当煤层倾角为33°时,下山边界角最小。
In order to obtain the law of overlying strata and surface movement and deformation of coal mining with different dip angles, based on the geological mining conditions of 8101 work face in the seam mining area of Erdos coalfield, the numerical simulation was carried out using FLAC 3D. The results show that the maximum caving height of the central roof of working face and the maximum uplift height of the central floor of the working face are obviously polynomial relations with the dip of coal seam when mining at different dip angles. The maximum subsidence value and horizontal movement value of surface dip with the increase of dip angle Large and showing a cubic polynomial relationship; mining impact on the propagation angle, uphill boundary angle and coal seam dip was significantly decreased relationship; downhill with the coal seam angle increases, the first increase and then decrease, when the coal seam angle of 33 °, The minimum mountain boundary angle.