大采高综放开采适应性研究

Adaptability of longwall top coal caving with high cutting height

通过数值模拟的方法对顶煤冒放性影响因素、煤壁稳定性影响因素进行综合分析,得到了顶煤拉伸破坏系数与煤壁拉伸破坏系数的多元线性回归方程,给出了大采高综放开采对煤层强度下限以及对煤层开采厚度上限的要求,并在平朔安家岭煤矿和潞安屯留煤矿进行了应用。应用结果表明,大采高综放开采有利于工作面实现安全均衡生产。

Based on the numerical simulations of coal wall stability and top coal cavability in longwall top coal caving face with high cutting height,the multiple linear regression equations of top coal and coal wall tensile failure coefficients were put forward.According to the relationship of mining height,coal height and coal strength,lower limit of coal strength and upper limit of mining height were suggested.Actual practice in Anjialing and Tunliu Coal Mines shows that longwall top coal caving with high cutting height is an effective approach to safety and high-efficiency.