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ASSESSMENT OF THE SUSTAINABILITY OF THE WORKINGS OF THE EXCAVATION BLOCK AT THE BOTTOM RELEASE OF ORE BY SELF-PROPELLED MACHINERY
Abstract
The existing methods of underground mining of ores in world practice are characterized by the maximum simplification of the preparation and cleansing schemes, the desire for high intensification of mining operations. However, the high irregularity of the bottom of the block, as well as the long period of its operation, especially with systems with collapse and areal ore production, when mining steep extensive heavy-duty deposits, impose certain restrictions on the design and parameters of delivery and cutting horizons. In this connection, research in the field of substantiation of the structures and parameters of the bottoms of the blocks are very popular and relevant, allowing to determine and recommend optimal technical solutions at the stages of mining planning. In the article, the stability of the bottom of the block with the release of ore through a delivery point with two loading points is justified on the methods of graphic design and numerical modeling of the stress-strain state of the rock mass. Considerable attention is paid to the geomechanical substantiation of the stability of the structural elements of the development systems and the choice of the type and parameters of the mine fastening.
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