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通过对不同岩石组成的煤岩体在不同煤岩高度比例和不同组成倾角条件下的数值模拟,探讨不同因素对煤岩体冲击倾向性的影响。模拟结果表明,煤岩体中岩石强度越高,试样的强度随着岩石高度比例的增加增长得越快,组合试样的弹性模量也越高。煤岩体的冲击能量指数随着煤岩组合体间角度的增大而减小,并且随着倾角的增加,石灰岩煤组合体和粉砂岩煤组合体峰后塑性变形明显。
The impact of different factors on the impact propensity of coal and rock mass is discussed through numerical simulation of coal rock mass with different rock composition under different coal rock height ratios and different composition dip angles. The simulation results show that the higher the rock strength in coal and rock mass, the faster the strength of the sample increases with the rock height ratio, and the higher the modulus of elasticity of the composite sample. The impact energy index of coal and rock mass decreases with the increase of angle between coal and rock, and with the increase of dip, the post-peak plastic deformation of limestone and siltstone coal is obvious.