充填体支护性能对采场围岩应力应变影响机理

摘要

In order to study the influence mechanisim of supporting property of fillmaterial on surrounding rock of stope,setting Axi Gold Mine as an example, the auther studies mining and filling process of stope with the methods of numerical simulation by three - dimensional numerical analysis software FLAC3D. The article analyzes the influence of roof - contacted filling, the material parameters of fillmaterial and filling methods to the stress and strain law on surrounding rock and fillmaterial of stope. The results show that the influence role of whether stope roofs are able to be tight in filling to surrounding rock strain and distribution of plastic area is obvious. The greater the rigidity of fillmaterial,the stronger support ability of surrounding rock. The strain of surrounding rock under different filling method are also different.%为研究充填体支护性能对采场围岩的影响机理,以阿希金矿为例,运用三维数值分析软件FLAC3D,对采场开挖和充填过程进行数值模拟计算.本文分析了充填接顶情况、充填体材料参数和充填方法对采场围岩和充填体应力应变规律的影响,结果表明:充填是否接顶对围岩应变和塑性区分布影响作用明显；充填材料的刚性越大,支护围岩的能力越强；不同充填方法下围岩应变情况有差异.