Dongxiang Copper V Ore Body In Deep Mining Research

Dongxiang Mine is about to enter the stage of deep mining, while the mining condition is very complex because of high temperature, easily broken, strong agglomeration and uneven thickness in the ore body, in order to meet the need of production capacity of Dongxiang Mine, the paper which combined with the occurrence characteristics of deep ore deposits about the V orebody has studied stope structure parameters by setting a goal of selecting the suitable mining method and optimizing stope structure parameters, synthetically considering the effect of various factors in mining engineering,using numerical simulation to quantitative calculate and analyze the stress change, displacement law and development of plastic zone in surrounding rock during the process of stoping, and then ensuring the mining practice going as a way of the safest, the most reasonable, the most efficient and most economical. The paper mainly conducted a research on the following content:1.Based on analyzing and researching mining technology conditions and production status of deep V orebody, five alternative programs of mining method was selected, through the contrast value between 13 indicators of evaluation and indicators of target program, and divided it into quantitative factors, nature factors and formed evaluation matrix; The weight of evaluation factors has been identified by using binary comparison method, and the mining method of deep mining about V orebody has been optimized by fuzzy arithmetic operations.2.The tailings chemistry experiments and the physics experiments of uniaxial compression in paste filling about the orthogonal design of multi-factor were done in the laboratory, the paper studies the effect factors on strength of paste filling by using multiple linear regression based on least squares, which reveals effect law of strength of filling based on 3 factors such as slurry concentration, ratio of gray and sand and the time of conservation.3.Through the combination and applications of ANSYS and FLAC3D, the simulation calculation about layout of stope, structure parameters and layout of structure stoping at bottom was done and the comparative analysis of stress, displacement and distribution of plastic zone was done during excavating and filling process, and it is obtained a layout of stope and a ore removal way of the bottom which is suitable for V orebody.4.Multi-factor orthogonal experiment was completed by the numerical simulation of stope structure parameters, through range and multivariate linear regression based on least squares method, it is obtained the effect law of stope stability which is due to the length, width, height and studs, and fitted out the regression equation about the relationship between four factors of stope and maximum main stress of the stope, tensile stress of roof, horizontal displacement, plastic zone and also the regression equation of exposed area.