Dew Turn Of Yongping Copper Mine Pit Transition Open-pit Mining And Pit Mining Research Relationship Between Time And Space

Open-pit to underground joint exploration is one of the trend of the development of the Mineral mining, and the research of the related key technical problems also get a large degree of attention at home and abroad. But In the transitional period of open-pit to underground joint exploration, the relationship between time and space in open and underground mining is lack of research, or the optimization and evaluation to the league in transition model are not formed a feasible research method. Facing these problems, This paper based on the actual engineering practice of yongping copper Transition from open pit to underground mining with multi-research methods, the computer numerical simulation and comprehensive evaluation analysis, mainly to research the relationship between time and space of the mining and underground mining, the main research contents are as follows:According to the complex model of Yongping copper mine, we adopt dimine-surpac-ansys coupling modeling and numerical simulation results analysis the displacement field and stress field of slope to get the optimal transition model of open and underground mining, which is using downward mining II and IV ore bodies;Combined with the application of the optimal joint mining mode in Open-pit to underground joint exploration, DIMINE3d visual modeling has been used to do the study on the spatial relationship of the mining and underground mining, And the reasonable arrangement of production schedule has been used to do the study on the time relationship of them, so that the two conclusions are obtained, The first conclusion is open mining slope final state must be considered in the underground mining subsidence area In each other spatial relationship, and the other conclusion is mining rooms earlier than pillars which do not affect open mining realm in the underground mining, In order to reduce the influence of open mining slope and underground mining stope, we take comprehensive measures, which include staying10～15meters border spot, Filling mined-out areas with classified tailings, and monitoring rock mass deformation and strain after blasting in open mining;According to the application of the mode of transition from open-pit to underground mining, comprehensive evaluation analysis theory has been used to evaluation the linkage degree betweem the open-pit mining and underground mining in time, space integral production capacity and mining system, so that the conclusions are obtained that joint exploration is order-parallel mining in time, the mining and underground mining are both in a vertical plane and level surface, and mining technologys are lack of combination.