FIELD: mining.
SUBSTANCE: method comprises formation of the working area, technology of mining overburden benches and providing cargo communication of the working horizons to the surface, the overburden benches of the working area are taken of the increased height (25-30 m), based on the condition of their mining using excavators with extended working equipment, the benches are combined into groups of three in each. At that for the upper and lower benches in the groups the minimum working areas are provided with dimensions equal to the width of the transport platforms, providing two-way traffic of technology vehicles and its manoeuvring, for the middle benches the width of the platforms is taken equal to the sum of the width of minimum working area and the width of the recess stope with ready-to-dig volumes of overburden, providing the necessary speed of reduction of mining operations in each group of overburden benches of the working area during the formation of the breakdown of the blasted rock mass based on conditions of placing it on the middle and lower benches. And the breakdown of the rock remaining on the middle benches, is divided into two layers, the upper of which are worked out with excavators with top loading into vehicles that are on the platforms of upper benches, the volumes of the lower layers and volumes of the overburden dumped with explosion on the lower benches are worked out with individual excavators with loading to vehicles at the same level with them. After working out the ready for excavation volumes of overburden in all groups of benches and formation of the corresponding volumes on the adjacent underlying benches and displacement of the boundary of the groups occurring at that down by one bench, their working out is repeated in the above procedure, opening the overburden benches of the working area of is carried out using steep sliding cross-overs with the longitudinal slope of 12-15° and width, providing placement of the breakdown of the blasted rock mass during their extension and at the same time the through passage of the technological transport, the extension of steep cross-overs is carried out using track and wheel loaders by dividing the breakdown of the blasted rock mass to the horizontal and inclined layers with the height defined taking into account the trajectory of motion of the loader bucket.
EFFECT: reduction of current stripping ratio in the initial period of working out of the field.
3 dwg
