Optimization Of Underground Mining Method And Stope Structure Parameter For Gently Inclined Thin Orebody Bauxite

Aluminum is one of the most widely used metal in the world now. At present, China has become the world’s superpower in aluminum production and aluminum consumption, Aluminum has an important strategic position on maintaining national stability and maintaining rapid economic development. Bauxite is the main raw material for aluminum production, with the increasing demand for aluminum resources, with the increasing domestic consumption of bauxite reserves surge, accumulation-type bauxite for open-pit mining declined day by day, so it is urgent to take research on underground mining of primary sedimentary bauxite.The Nanchuan bauxite mining area of The Chalco Chongqing Branch, mostly contains slowly inclined thin orebody of primary sedimentary bauxite in this area, which is difficult mining deposits now in the world. Integrity and continuity of this type ore deposit is poor, the rock stability of direct roof and floor is not strong, orebody is thin; deposit more complex hydrogeological conditions, resulting in a serious waste of bauxite resources.According to the actual situation of mine, the mining method optimized by adopting the combination of analytic hierarchy process (AHP) and fuzzy mathematics method to select and determine the index system of optimal selecting mining method, choose consistent with mine actual indicators. Based on the given criteria weights and in combination with economic and technical indicators of the same mining method in the mine, can choose the reasonable mining methods. The method combining the application of analytic hierarchy process (AHP) and fuzzy mathematics, avoids the influence of the subjective judgment of data selection, and can turn the qualitative index quantitatively, thus expressed advantages and disadvantages of mining method in the form of numerical. Finally, the hydraulic prop canopy guard continuous mining method is the optimal solution, provide a reference to gently inclined thin oreboby mining, has certain guiding significance. In the stope structure parameters optimization, using the large-scale finite element analysis software ANSYS to analyze, combined with the experts’experience and the chosen close to actual stope structure parameters of similar mines, get the matching stope structure parameters. At the time of optimization, first determine a stope parameters, then change another parameter to optimize. After determining, on the basis of it, the research on another parameter is optimized. By this way, it is a good way to avoid repeating the experiment research, give full play to the advantage of ANSYS in the mechanical analysis. Through such a series of analysis and optimization, the final choice of the optimal parameters for the stope is60m x10m x2m. It has a guiding significance on mine production, the research process and results have a certain reference value for other similar mines.