Approbation of the technology of efficient application of excavator-automobile com-plexes in the deep open mines

Abstract

ApproBAtIon of the technoloGy of effIcIent ApplIcAtIon of excAvAtor-AutoMoBIle coMplexes In the Deep open MInes purpose. To establish the feasibility of implementing the technology for working out the overburden rock ledges and ore min ing by transverse panels in steeply sloped layers within a single open mine until the end of its operation. Methodology. In substantiating the spatial position of the staged contours of steeply sloped layers in roundshaped open mine fields and their optimization, the following methods were used: Bellman's analytical and optimal control methods in dynamic programming in combination with an integrated mining and geological information complex basing on a digital model of an iron ore field. To study the reserves of increasing the productivity of excavatorcar complexes, when switching to the technology of working out pit banks with transverse panels in steeply inclined layers from top to bottom with a shift of the open pit spacing, methods of correlation and regression analysis were used. findings. Based on the distinction between the concepts of the nearcontour and deep zones of deep open mines and the in troduction of two new parameters for the relationship between the contours of the ore field and the dynamics of the open mine formation, a method of justification of the spatial position of the staged contours of steeply sloped layers in roundshaped open mine fields has been developed. Compared to the deadend turn of automotive dumping trucks according to the used technology for working out ledges with longitudinal panels, the transition to working them out with transverse panels with a width of 60-80 m, with a loop turn of the automotive dumping trucks for loading will increase the productivity of excavators at least by 25-30 %, which, along with a decrease in the spacing of the open mine sides, compensates the intensity of the ore field overburden from top to bottom within the boundaries of steeply sloped layers even with a significant lag of overburden operations. originality. The transition to the technology of working out ledges with transverse panels in steeply sloped layers is the only solution if the overburden lag exceeds the current design overburden volumes when mining approaches the limit contour of the open mine surface. In the studied extremely deep iron ore open mine, even when the design volume of the current (annual) over burden operations increases by more than 3 times, this technology allowed reducing the overburden lag by 25 % and shortening the period for the development of the ore production capacity from 8 to 5 years. A mathematical model has been created to optimize the contours of working out stages for steeply sloped fields when working out ledges with transverse panels in steeply sloped layers, in which the functional contains the fourthorder nonlinearity in relation to the required value-the width of the panels. Automa tion of calculations for optimizing the parameters of the design of the working open mine sides in the dynamics of the development of minin...

Substantiation of technological resource-saving conditions for the use of equipment in the sand deposit mining

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Probabilistic assessment of slope stability at ore mining with steep layers in deep open pits

“…Unlike elongated open-pit fields, mining operations in a round-shaped open pit are conducted along the entire perimeter of an open pit in all its walls. In the study [7], the expediency of mining the benches with transverse panels along hard overburden rocks and ore is substantiated for these conditions. The implementation of mining with transverse panels is the most rational option for the operation of powerful excavator-automobile complexes, since the highperformance use of these complexes is achieved precisely on wide sites, where it is possible to switch from a dead-end turn of dump trucks to a loop for loading rock mass.…”

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Research of land-saving schemes of mining the horizontal sedimentary mineral deposits

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