【摘要】 根据龙泉煤矿4号煤的围岩力学条件,对大采高煤壁片帮机理进行了理论分析,通过数值模拟得出了煤壁片帮和支架工作阻力的函数关系,研究结果认为本矿4号煤若采用大采高一次采全高,煤壁片帮较严重,不利于回采工作面煤帮和端面顶板管理。根据数值模拟结果和工程类比结果确定了在这种具体条件下的合理采煤方法。更多还原

【Abstract】 Which the specific geological condition of the Longquan Number 4 coal seam as background,the coal wall spalling mechanism was analyzed.The function of coal wall spalling and powered support’s working resistance was obtained through numerical simulation.The results show that the No.4 mine seam wall spalled seriously,which was unfavorable to the Mining coal wall and roof management.According to the results of numerical simulation and engineering analogy,the rational mining method in these specific conditions was determined.更多还原