摘要
针对深部厚层坚硬顶板灾害,运用数值模拟及现场监测,分析了坚硬顶板开采条件下采场围岩应力及能量积聚演化规律。结果表明:坚硬顶板的不易垮落性及开采扰动是采场围岩应力及能量显著增加的主导因素,为顶板灾害的发生提供了潜在的力源及能量条件,且煤层较其他岩层中积蓄的应力及能量值大;提高工作面支架阻力可有效改变坚硬顶板剪切破坏形式,从而减低顶板灾害发生的可能性。
For deep and thick layer of hard roof disaster, stress and energy evolution laws of surrounding rock under hard roof mining condition were analyzed by using of numerical simulation and field monitoring. The results showed as follows: Hard roof caving and mining disturbance are the main factors to increase the stress and energy of the surrounding rock, which provides a potential source of power and energy conditions. At the same time, the stress and the energy value of coal seam are larger than that of other strata. Increasing the support resistance of the working face can effectively change the shear failure mode of the hard roof, so as to reduce the possibility of roof disaster.
出处
《山东煤炭科技》
2016年第6期9-12,共4页
Shandong Coal Science and Technology
关键词
坚硬顶板
垂直应力
能量积聚
剪切破坏
hard roof
vertical stress
energy accumulation
shear failure
