Optimization And Application Research On Semi-continuous Technology System With Mobile Crusher In Large Open Pit Coal Mines

Based on the need of mobile crusher semi-continuous mining system application in large open pit mines, this dissertation comprehensively applies surface mining theories, mining engineering system theories, technology economics theories, as well as computer technology. Through investigation researches, theoretical analysis and spot engineering practice, we research on crushing equipment selection, structure optimization, determination of crusher locations and shifting distance, as well as the application of stripping semi-continuous technology system.Based on the results of previous studies, we summarize the classification of crusher and the concepts of all kinds crushers in this dissertation. With the aim of open pit profit maximization, this study established a two-grade crusher comprehensive optimization model. In addition, according to the needs of stripping semi-continuous technology system used in open pit coal mine, the crushing characteristics and suitable crusher type of the high moisture content and easily bond material are analyzed. This dissertation present a view of modular crusher station as well as to improve the flexibility, reliability, and local production ratio of the crusher station, and to improve the working environment. Based on these, we established the parameter optimization model of feed hopper structure. This dissertation shows the previous research results on truck-shovel match of shovel truck discontinuance technology system, and analyzes the characteristic of truck transport under mobile crusher station semi-continuous mining system. Targeting the lowest system production cost we establish the optimization model of truck type. According to the characteristics of mobile crusher locate in pit, this dissertation analyzes the affect factors and establishs the optimization model of crusher station location optimization model and shifting distance optimization model. We also introduce the transport distance increase coefficient k into the optimization model to embody the influence of belt conveyor transport system of the lower level to the internal dumping distance of upper levels.According to the need of stripping semi-continuous technology system application and the characteristics of mobile crusher, we establish service areas model of open pits semi-continuous mining system, group bench mining model and strip width optimization model in this dissertation. These models provide the basis for service areas and mining parameters determination of stripping semi-continuous technology system. In order to meet the needs of stripping semi-continuous technology system application with mountain slope dumping area, system characteristics, link structure, application conditions and economic efficiency of discontinuous - continuous - discontinuous form semi-continuous technology system was analyzed in this dissertation. In order to improve the belt conveyer efficiency, we presented combined system that crusher and bucket wheel excavator use the same transport system, and four kinds crusher station location have been compared.We verify the practicality of models established in this dissertation through case studies. The research results have a positive significance for enriching the semi-continuous technology system theory and constructing the large efficient low-carbon open pits.