Xiadian Gold Mining Safety Technology Deep

Mining depth in Xiadian Gold Mine has reached800m, and has been gradually into the deepmining. Mining work is not only in a high-stress environment, but also between orebody andhanging wall rock are full of fault gouge which is thickness-uneven, broken and caving-easy;meanwhile the non-loss high grade bonanza kept close to the hanging wall; all of these contributeto the complicated mining conditions. In order to ensure the safe and efficient deep mining inXiadian Gold Mine, on the basis of comprehensive analysis deep mining conditions of XiadianGold Mine and occurrence situation of â…¦-1orebody, paper studied on mining method,completed optimization of stope structure parameters and tested stope mining design for themining method, which provided scientific basis and application guidance for safe, high-efficiencyand economic deep mining in Xiadian gold mine. In the paper, specific research contents aremainly as follows:（1） Through comprehensive analysis on deep mining conditions of Xiadian Gold Mine andoccurrence situation of â…¦-1orebody, combined with application status of safe andhigh-efficiency deep mining method under high-stress environment at home and abroad,5kindsof reasonable mining methods has been designed and selected,13quantitative or qualitativeindexes that had a great influence on the selection mining methods has been used to evaluate it.The index weights were established by using variable weight, after the comprehensive evaluationof unascertained measure theory, the paper finally selected mining method for â…¦-1orebody deepmining;（2） Comprehensive utilization of advantages functions of three kinds of software, such asgeological modeling software-SURPAC, geotechnical engineering numerical analysis ofsoftware-ANSYS and FLAC₃D, solid model which was close to the actual mining wasestablished and carried out numerical calculation, stope stability of alternatives was analyzedfrom plastic zone distribution, stress and displacement changes three aspects, and preliminarilydetermined higher stope stability of the structure of the program;（3） FAHP （Fuzzy mathematic-Analytic Hierarchy Process） theory has been applied to establishthe comprehensive evaluation hierarchical model of stope structure parameters superior degree,the weights of every index and every layer was determined by dualistic relative comparativemethod, metric function was adopted to establish membership degree matrix of index. After fuzzycomprehensive evaluation, the paper obtained the highest comprehensive superiority degreescheme which was security、economic and technical.（4）Choosing typical geological conditions of the area to test stope mining design, and achieved good technical and economic index which provide scientific basis and application guidance forsafe, high-efficiency and economic deep mining in Xiadian Gold Mine.