Optimization Of Sijiaying Iron Ore Mine's Final Pit And Mining Schedule For Different Development Systems

Sijiaying Iron with the slope of rock west is relatively stable,and east slope is unstable.If we open up the road,opening up the pit line needs to be laid in the west slope.However,the west slope has a high-voltage wire and the limit of the tape transport corridor,and open pit lines are arranged in the west slope make the final inclination angle of transformation.Due to the limitation of high-voltage wire and the belt transport corridors are not expansion,you have to improve the state bottom,reducing the amount of open-pit mining.So is the original design of the realm:Several steps of the upper start using east slope transportation routes,taken to a certain level after the switch inclined tape transport,Thus,neither in the west slope arranged transport pit line,they do not need long-term to maintain the stability of east slope transport pit lines.Now,however,it has been mined to the original design of the switch level Inclined tape transport of the following,and several steps in the upper part of the west slope is coming to slope,and east slope is since the rock stability problems are difficult to meet the transport requirements and the outlet is away from the tipping point,and the original design of the slope does not exist,and mine production is soon in trouble.Now we need to re-optimize transportation planning and boundary pit lines.In the realm of the optimization process,it is need to get the actual technicalparameters related to geology,Then analysis process is set up to run the software surface of elevation model,level model,grade model and so on.Due to the west with the slope of a restricted high-voltage wire and tape transport corridor,it is need to requires the establishment of constrained and unconstrained grade model.Open up pit lines are arranged in the west slope make the final inclination angle of 7 degrees slowed,so it also established two different inclination angles to optimize the analysis.Since Sijiaying iron ore has two mining area,and technical and economic parameters of the two mining areas are not the same,so it is the introduction of technical and economic division line to let two mining areas according to their technical and economic parameters while optimizing.Paper "cone exclusion" as the theoretical basis,and it is using OpMetalMiner software to optimize the analysis.Paper introduces the basic idea of the cone of elimination to produce optimal realm.First we determine a possible maximum state,then start from the largest state,by repeatedly scanning cone,excluding profit cone,until in a single scan cone no such date,the process of elimination,and the inclination angle of the remaining state is not greater than a given end Slope Angle.In order to provide different mine development plan selection basis,this paper three options were analyzed boundary optimization and production planning optimization:Option ?,the transport pit lines are arranged in the west slope not raising bottom realm,if you need to move the high-voltage wire and tape transport corridors;Option ?,the transport pit lines are arranged in the west slope not moving the high-voltage wire and tape transport corridor,If the pit is limited you raise the bottom;Option ?,using inclined tape transport,without moving high-voltage wire and tape transport corridors.Three state-based program optimization results showed that:Due to the influence of surface structures,option ? than Option ? less approximately one hundred million and twenty million tons of ore;Option II in the West slope transport the pit line arrangement,Option ? than Option ? less about 42 million tons of ore and state total profit reduction of about 1.76 billion yuan.Under conditions of surface bound,the west slope arranged transport pit line than not arranged transportation pit line realm is smaller.From the boundary contour shows that the west slope layout opening up pit will make realm Bottom line raise to a new level.In the realm be optimized by stripping plan optimization to 2.5 million tons as annual mining capacity resolution,generating mining sequences model,geological optimal stope dynamic sort sequence generated stripping plan optimization.Stripping plan for the three programs conducted a preliminary optimized by the present value of the profits of the three programs for mine decision-making.