Research on Support Technology of Deep Stope in a Gold Mine Based on Rock Mass Quality Classification
The scientific and reasonable selection of support parameters for deep mining is the key to ensuring its long-term stability.Taking a gold mine in Shandong Gold Group as the research background,a three-dimensional digital photogram-metry system was used to measure the structural planes of the 17 line vein crossing rock mass in the middle section of the min-ing area at-620 m.Parameters such as the occurrence of the structural plane,joint spacing and density of the rock mass are obtained.Two methods of Q and RMR are used to grade the rock mass quality.It is concluded that the 17-line through-vein rock mass in the middle of-620 m is a class Ⅳ inferior rock mass.On this basis,the support scheme of surrounding rock in stope is proposed by theoretical analysis method,and FLAC3D software is used to simulate the support scheme,and the distri-bution of displacement,stress and plastic zone of surrounding rock stope before and after the support.The results show that for the surrounding rock with stability level Ⅳ,the support method of anchor cable+bolt combined with concrete shotcrete can ef-fectively control the deformation of the roof and two sides,reduce the stress concentration degree,and ensure the stability of the surrounding rock in the mining area.This study has determined a reasonable support scheme,and provided a scientific basis for mine safety production and support design.
3D digital measurementrock mass classificationdeep supportnumerical simulation
万方数据
维普
