In order to optimize the coal caving process of the fully mechanized caving working face in the extra-thick coal seam of Suancigou Coal Mine,improve the top coal recovery rate of the working face and reduce the mixed gangue rate,the 6upper 108 working face of Suancigou Coal Mine was taken as the research background.The numerical model of coal caving in working face was established by using PFC2D particle flow software.Five different coal caving processes were simulated and analyzed,and field tests were carried out.The results show that when the thickness of the coal seam is greater than 20 m,the coal caving effect of the group multi-round coal caving process is the best;when the thickness of the coal seam is less than 20 m,the two-round interval coal caving process is the most reasonable.
维普
万方数据