Optimization Of Schemes For Western Mining Boundary In Wulongquan Limestone Mine

Wulongquan Mine is divided into eastern area and western area.In order to meet the demand of high-quality limestone for WISCO,high-quality limestone in eastern have been exploited intensify,which lead to the hysteretic production of dolomite and the lack insurance capacity of limestone.It is necessary to exploit western and to link up the eastern and western areas.In order to achieve a smooth transition,four feasible boundary schemes about werntern area have been ensured with the principles of technical feasibility and economic rationality according to the geological conditions of western and current status of eastern.Nine indicators have been calculated.They are the total volume,high-quality limestone volume,overburden amount,mining infrastructure,tailing pond construction,new equipment,engineering-hydrogeological conditions and resource utilization.And the index system of boundary has been bulit on the basis of the nine indicators.With the combination of AHP and Fuzzy Comprehensive Evaluation,a boundary optimal model is bulit and then construct two-level AHP weights model by index's attribute.So the weights are ensured by qualitative analysis and quantitative analysis.The obscure evaluation matrix is ensured by four-levels obscure commments and expert goup decision-making methods.at last,according to comprehensive evaluation scores to ensure the optimal and inferior order.The research results indicate that big final-slope line sheme about moving(of building) the tailing pond and extenting to 43m is the best one.