Selection Of Mining Methods For A Mine And Optimization Of Structural Parameters Of The Stope

Tianma mountain sulfur gold ore resources is dried up,because of the early stage of the mining,-215-m above the middle of some 1 million m after is not filling empty area,this situation seriously affects affects the safety of the mining area.In order to-255-m middle safe and efficient production,recycling resource adequately,in-situ experience and relevant theory will be applied to the value engineering theory,numerical simulation,the AHP-TOPSIS method and field monitoring method will also be studied,the mining method and in the central part of the stope structure parameters,system analysis and in-depth study is made on the final results are as follows:?1?The relevant data and field survey will be analyzed,understand the present situation of the engineering geological conditions and mining in mines,orebody distribution and mining technical conditions were determined,which will provide a scientific basis for subsequent mining method selection.?2?According to the mine geological exploration data and the mining technical conditions of three kinds of suitable mining scheme will be selected,value engineering theory,through expert evaluation assignment will also be used for mining methods,select 7 mining method and influence factors as evaluation index,calculate the value coefficient of each scheme in turn 33.0%,30.0% and 45.0%,choose the highest value coefficient of sublevel open stoping mining method,filling method for later and preliminary design of the selected project,calculate the main technical and economic indicators.?3?ANSYSA and jointly build complete FLAC₃D orebody model and numerical simulation will be applied deeply,also changes from the stress and displacement and plastic zone distribution three aspects of 12 kinds of different specifications of the structural parameters of stope stability analysis,stability good four schemes are selected,and using the analytic hierarchy process?AHP?and close to the ideal solution sorting method from three aspects,such as economy,safety and technology selected seven indicators is built into the AHP-TOPSIS evaluation model for comprehensive evaluation,it is concluded that the highest comprehensive superiority of the stope structure parameters of.?4?According to the optimization of stope structural parameters,combined with field monitoring experience,in-255-m in the middle on stope roof of ore body footwall rock and a complete set of field monitoring network was designed.According to the monitoring of the stress and displacement data obtained were analyzed,and the key area to predict stress is revealed,to provide guarantee for stope safety mining,so as to verify the optimum mining scheme and the superiority of stope structure parameters.