Mining Technology Study Of Inclined Medium-thick Orebody In Yanglinao Mining Area Of Chuankou Tungsten Mine

Abstract:The Chuankou tungsten mine, which has been mined for decades, is rich in low-grade tungsten mineral resource. However, because of the morphological complex orebody, there are many technical promblems in currently used non-pillar sublevel caving method and continuous stoping sublevel open stoping method, affecting the levels of economic efficiency and sustainable development of the mine. In order to achieve the safe and efficient recovery of mine resources and improve resource utilization, a study on mining technology was made in Yanglinao mining area, on the basis of the site survey and the existing correlation theory. According to the geological conditions, the most suitable mining method was selected by using the comprehensive evaluation method; the best stope structure parameters was obtained by applying the numerical analysis software to analyze stress and displacement of under different stope structure; and the monomer design is put forward for selected mining plan. The paper mainly achieves the following research results and conclusions:(1) In order to be familiar with the mine geological circumstance and mining technology conditions, obtain various parameters of the ore, and collect all the required information, the site investigation and data collection are made.(2)Most of the ore body is determinded as inclined medium-thick orebody through ore body classification, after which three tentative mining programme are selected along with programmes of Stope layout and mining process overview.(3) Based on the theory of analytic hierarchy process, grey relation analysis and TOPSIS, the weighted TOPSIS-GRA comprehensive evaluation model is established before optimizing the three mining scheme selection, after which the synthetic superior degrees are caculated to determine the optimum mining programme.(4) By using the finite element analysis software MIDAS to simulate stope stress and deformation conditions of different stope structure parameters, the optimal structure parameters are determined. (5) The monomer design of the optimal mining method is performed, including constituent elements of the Stope, mining cutting engineering of roadway layout, stope filling technology, mining equipment selection technical and economic analysis, etc..