充填采矿法胶结充填体力学作用分析

Mechanical Action on Cemented Filing Body in Cut and Fill Stoping

结合某矿山应用胶结充填采矿法的试验 ,测试胶结充填体的力学参数 ,采用数值模拟方法研究胶结充填体的受力情况和变形特征。结果表明 :尾砂胶结充填体 ,具有独特的支护特性和力学特征、良好的可塑性和较高的残余强度 ;尾砂胶结充填体受动态载荷作用的动态强度、动态弹性模量均高于受静态载荷的静态值 ;胶结充填体的支护作用是对围岩的限制和与围岩的共同承载。

Based on the experimental results from a mine and the mechanical parameter measurement of the cemented filling body, the stress distribution and deformation behavior of the cemented filling body are investigated by use of the numerical simulation. It is indicated by the research that the cemented filling body features with distinctive support function and mechanic characteristics, and the excellent plasticity and high remain strength. The dynamic strength and elastic coefficient for dynamic loading is better than that in static situation. The support function of the cemented filling body includes restriction to wall rock and load bearing together with wall rock.