厚煤层大采高提高煤壁破坏的工艺参数优化

Optimization of process parameters for high mining heightin thick coal seam to improve coal wall failure

我国的煤炭资源中,以厚煤层形式分布的占据一半左右,厚煤层的开采效率对煤炭的生产效益具有重要的影响。采用大采高综采工艺进行厚煤层的开采,在我国具有广泛的应用。随着开采高度及工作面的推进,在提高煤炭开采效率的同时,造成煤壁的稳定性降低,影响开采的效率。采用Flac3D数值分析软件,针对煤壁的破坏性,在不同的采高及工作面长度参数下,对煤壁的破坏性进行分析,并由此进行煤壁破坏系数的计算,得到煤壁破坏系数随工艺参数的变化规律,从而为确定最优化的开采参数提供参考,加强对煤壁破坏的控制,提高开采的效率,并保证开采的安全性。

In the coal resources of our country,the distribution of thick coal seam occupies about half,and the mining efficiency of thick coal seam has an important influence on the production benefit of coal.The mining of thick coal seam with large mining height fully mechanized mining technology is widely used in China.With the advance of mining height and working face,the stability of coal wall is reduced while the efficiency of coal mining is improved,which affects the efficiency of mining.Flac3D numerical analysis software was used to analyze the destruction of coal wall under different mining height and working face length parameters,and the failure coefficient of coal wall was calculated.The variation law of coal wall failure coefficient with process parameters is obtained.