| Nearly horizontal open-pit coal mines are horizontally advancing in the mining process,and do not need to be deepened;the gobs can be fully dumped;the movement of the crusher is basically a translation of the same elevation.Based on this feature,this paper first determines the relocation parameters of coal crusher in nearly horizontal open-pit coal mine,and analyzes the factors that affect the layout and the relocation of the crusher.Based on the open pit geological factors and the establishment of the transportation system,comprehensive consideration will be given to the coal transportation costs,impact on inner dump space,increasing the cost of stripping transportation and the cost of crusher relocation.The calculation model for coal production costs was establishedThe study of the layout and movement of a single crusher is conducted.Taken the minimized cost of coal transportation as a goal,the location of the fixed crusher is optimized.Proposed semi-fixed crusher layout program and the corresponding conveyor layout are researched.The advantages and disadvantages of each program and applicable conditions are analyzed.The coal production cost is taken as an objective function.The crusher layout and movement parameter limitation are taken as constraints,the single crusher layout and movement optimization model are established.The genetic algorithm is used to solve the numerical solution of the model,and the differential equation is used to solve the analytical solution of the crusher arranged on the surface level model.The layout and movement of two crushers are researched.A cost compensation method for the layout of crushers is proposed to study the methods of two crushers layout.Semi-fixed crushers and corresponding belt conveyor arrangements and movement programs were studied,and two crushers movement methods were proposed.The advantages and disadvantages of each program are analyzed and evaluated.On the basis of the single crusher station layout and movement optimization models,two crushers layout and movement optimization models were established.The genetic algorithm was also used to solve the numerical solution of the model.Taking an open-pit mine as an example,the layout and movement of the crushers are optimized.Finally determine that the crusher should be arranged at the level of the coal seam roof,ahead of the current coal mining center of gravity 104.1m,and the crusher movement step distance is 297.9m.The two crushers adopt an offset arrangement,the crusher is laid on waste of middle bridge,and the two crushers adopt a “step-by-step” transfer.A study of the layout of belt conveyors was carried out to determine the relocation process of the crusher and the belt conveyor. |
