深井回采巷道底板岩体破坏运移特征与控制

The destruction migration features and controlling of floor rock in the deep mining roadway

随着开采深度的增加,矿井巷道底臌问题愈趋严重.针对深井巷道底臌问题,利用弹塑性力学理论计算了巷道底板岩层的抗弯刚度和压曲临界载荷,得出了不同深度、不同底板厚度情况下的压曲临界载荷曲线;以滑移线场理论为基础,对深井巷道底板岩体滑动区域和滑动路径进行分析,将成果应用于实践,提出了底臌控制具体参数及施工建议.

With the increase of mining depth,the problems of floor heave in the mining roadway is becoming more and more serious.Against the problem of the floor heave in the deep roadway,it calculates the bending rigidity and buckling load of the floor strata of roadway using the theory of mechanics of elastoplasticity,and arrives at the buckling load curve in case of the different depth and the different width of the floor;it analyzes the migrational and evolutionary process of the rock mass in plastic zones of the floor strata on the base of the slip line field theory,and then applying the results to practice,proposes the special parameters and the construction suggestions about the controling of floor heave.