综采放顶煤支承压力及合理采放比数值模拟研究

Numerical Simulation Study on Fully Mechanized Top Coal Caving Pressure Support and Reasonable Caving Ratio

煤壁前方煤体上超前支承压力的影响范围,应力峰值直接影响综放开采顶煤的破坏程度,研究超前支承压力的规律有利于顶煤自然放出,从而提高工作面采出率。建立不同采放比模型,研究不同采放比条件下支架前方空顶顶板的位移量,从而确定有利于顶板管理的最优采放比。

The influence range and stress peak of the forward bearing pressure in front of coal wall directly impact the degree of destruction of fully mechanized top coal. The study on the rule of leading support pressure is conducive to the natural release of top coal, thus improving the production rate of working face. Building a different set of models,the displacement of the front roof of the bracket is studied under different conditions of different mining and release ratio, so as to determine the optimum ratio of the optimal production of roof management.