| According to existing conditions of the Shanxi Qiandongshan plumbum zinc mine, such as the low ore recovery ratio and the insecurity of stope stability, etc. The stability mechanism of the underground stope was studied profoundly and systemically based on analyzing engineering geology, hydrological geology, physical and mechanical characteristics of ore and rock. In view of the actuality conditions, the FEM software ANSYS was applied to simulate several mining projects with different parameters of stope and ore pillars. The stability analysis of the stope was also analyzed by catastrophe theory. The main contents are as follows:(1) The information about geological hazards, geological structure, ore body occurrence characteristics, rock stress and so on has been gotten in Shanxi Qiandongshan plumbum zinc mine.(2) By means of in-situ investigation and lab experimentation, the systematic research of ore-body characteristics was carried out. The mechanical parameters of ore and rock-mass, which provided the basic data for the further study, were given out combined with the experimental results.(3) The ANSYS software was used to establish a 3-D model of the studied ore body field. Several different mining projects has been simulated.(4)Considering the energy release ratio as the optimization goal, the optimization was carried out assisting by stress and strain indices, several stope parameters were recommended. One of the recommend projects was compared with the project using now in mine.(5)The energy catastrophy value of both the recommended project and the project using now in mine was calculated. The recommended project has been verified to be valid. |
PDF Full Text Request