Numerical Analysis Of Mining And Visual Calculation Of Mining Index In Large-scale Blasting Stope

This paper aimed at actual production condition of large-scale blasting stope in Fankou Lead-Zinc Mine to carry out the research of stope mining numerical analysis and mining index visual calculation. It applied numerical analysis method, cavity 3D monitoring technology and 3D modeling technology method, took Cavity Monitoring System (CMS), mining 3D software SURPAC and numerical analysis software FLAC3D as research tool, coupled with the project——Cavity 3D Monitoring and Mining Index calculation in Fankou Lead-Zinc Mine, The main aspects were as follows:(1) Using the Compositional Modeling technology of SURPAC and FLAC3D, conduct pillar stope numerical analysis model. By the 3D numerical analysis research for stope mining, the author analyzed the impact of mining on surrounding backfill and predicted the destruction of the surrounding backfill, which further improved the blasting process, reduced mining index and provided the technology support for recovery quality.(2) Using CMS, the 3D monitoring of sixteen large scale blasting cavities has been completed in Fankou Lead-Zinc Mine, which broke though the bottle-neck of accurate measurement on large-scale blasting stope using traditional means and realized 3D visualization by building three-dimensional model. Based on it, utilizing mining geology and blasting design information in Fankou Lead-Zinc Mine, the relevant model for mining index visual calculation was built, which has laid the foundation for the follow-up mining calculation.(3) For the features of large-scale blasting stopes in Fankou mine, based on cavity measured model and stope relevant model, the mining index of pillar stope, like dilution rate and loss rate, can be calculated, which realized mining index visual calculation of large scale blasting pillar stope. By comparing the calculation result of mining index and mining numerical results, the method of carrying out numerical analysis to predict the destruction of the surrounding backfill in the process of mining in pillar stope was proved feasible, which had important practical significance for improving the mining quality and resources recovery rate.(4) For the features of large-scale blasting stopes in Fankou mine, based on cavity measured model and stope relevant model, the mining index of pillar stope, like dilution rate and loss rate, can be calculated, which achieved mining index visual calculation of large-scale blasting chamber stope and comparative analyed the differences of mining index visual calculation between large-scale blasting and pillar stope.