不同水平应力作用下巷道底鼓变形数值模拟研究

Numerical Simulation of Floor Heave under Different Levels of the Horizontal Stress

针对煤矿开采过程中经常出现的巷道底鼓现象,采用数值模拟的方法,对不同水平应力条件下的巷道底鼓变形情况进行了计算分析.结果表明:随着侧压系数的增大即围岩水平应力的增大,巷道底鼓量明显增大、巷道围岩体的破坏状态更加复杂、巷道底板两侧集中应力明显增大、巷道围岩体的变形速度也逐渐增大。

Aim at the phenomenon of floor heave which was emerged regularly in the process of coal mining, use numerical simulation, computational analyze floor heave under different levels of the horizontal stress. The result shows that, with the increasing of the side pressure coefficient or the surrounding horizontal stress, the floor heave value increases obviously, the destruction state of surrounding rock is more complicate, the concentrated stress on both sides of roadway floor increase obviously, the deformation rate of surrounding rock also increases progressively.