Longmen Mountain Mining Area L - 23 Orebody Upward Mining Technology Research

In this paper, according to occurrence characteristics of L-23ore body of yue shan copper mine, combining with the mine production ability and the relevant requirement of environment protection and the characteristics of the uplink type mining, taking the fuzzy mathematics method into the optimization of the mining, choosing the science of mining method. According to the selected mining method and the several stope layout plans from design institute, setting model to all sorts of schemes and then processing simulation mining with computer numerical model method. Based on stress distribution、displacement change and the plastic zone distribution of surrounding rock and filling in simulation mining to select the most safe, efficient stope arrangement. This paper studied content as follow:First, in this paper, the mining scheme, mining development and mining equipment three aspects are analyzed through reading the information of present development situation of mining technology at home and abroad, and combining with domestic mining experience, the present situation and development trend of mining technology at home and abroad.Second, did engineering geology survey research to underground mining rock to meet supplement of the mine geological data and numerical simulation data. Measured the rock mechanics parameters of skarn and diorate rock’s core in the mining area, and then processing rock mechanics parameters with engineering geology survey results and Roclab1.0software to produce rock mechanics parameters.Third, through analyzing mining technology conditions of the L-23ore body and mining experience of L-7ore body selected four optional mining methods. Having selected the most suitable mining method for L-23ore body through confirming12effect factors of ratio, the binary comparison method is used to confirm the corresponding weight of all the evaluation factors and fuzzy operators.Fourth, respectively digging and filing in four stope layouts with Ansys and FLAC3D. In each scheme of excavation and filling’s process, the maximum principal stress, minimum principal stress, shearing strength, vertical displacement, horizontal displacement and the plastic area are analyzed and then each scheme stope stability state is confirmed. Last, confirm the most safe, efficient stope layout from above.