邹庄矿大倾角综放开采放煤工艺参数模拟研究

Simulation Study on Drawing Technology Parameters of Fully Mechanized Caving with Large Dip Angle in Zouzhuang Coal Mine

为研究邹庄矿7_(2)煤层大倾角综放工作面的放煤工艺参数,运用PFC^(2D)颗粒流数值模拟软件,对比不同放煤步距、方式和顺序下的放顶煤率和含矸率,确定该工作面的最优放煤工艺参数。结果表明:放煤步距中,1.2 m是该工作面的最优放煤步距。单轮顺序上行放煤方式的顶煤放出率及含矸率优于其他放煤方式。通过本次研究,确定了邹庄煤矿7_(2)煤层大倾角综放面合理的放煤工艺参数,在实际生产中取得了良好的顶煤放出效果。

To study Zouzhuang coal mine 7_(2) coal seam dip angle fully mechanized working face coal technology parameters using PFC^(2D) particle flow numerical simulation software,comparing different interval,coal and sequence of the caving ratio and gangue content,determine the optimal coal working face in the process parameters.The results show that 1.2 m is the optimal drawing distance for this working face.The top coal discharge rate and gangue containing rate of single round sequential upward coal drawing method are better than other coal drawing methods.Through this study,determine the Zouzhuang 7_(2) deformation-failure of large dip angle of coal seam in coal mine reasonable coal technology parameters in the practical production has obtained the good effect of top-coal is released.