基于FLAC^(3D)的厚煤层顶分层开采支承压力分布特征研究

Study on Distribution Characteristics of Abutment Pressure in Thick Coal Seam Stratified Mining Based on FLAC^(3D)

采用FLAC^(3D)数值模拟的方法,以赵固一矿16011工作面的实际煤层条件为工程背景,分析了厚煤层顶分层开采时采场倾向和走向的支承压力分布规律。结果表明:走向和倾向的支承压力随着工作面的推近变化明显;工作面见方后,支承压力趋于稳定。同时,支承压力峰值大小、分布范围以及峰值点距离煤壁距离都与一般、综采放顶煤等工作面存在差异。

By the way of FLAC3D numerical simulation, the actual coal seam condition of 16011 working face in Zhaogu No.1 coal mine is taken as the engineering background, and the distribution law of the abutment pressure in the thick coal seam is analyzed. The results show that the abutment pressure in the strike length and the incline width changes obviously with the pushing of the working face. After the length of the working face is same as the width, the abutment pressure tends to be stable. At the same time, the peak of the abutment pressure, the distribution range and the distance between the peak point and the coal wall are different from the general, and full-mechanized top coal caving mining face.