Abstract
At a number of large open pit mines in Kuzbass, coal production costs have increased due to the deepening of mining operations. In order to reduce them, separate sections of coal mining at the upper horizons are operating or are being designed for mining at low current stripping ratio. For the same purpose, open-pit mining areas at the fields of existing quarries are operated and designed. Examples of such existing and projected areas are: the “Complex Synclinal” area at the Krasnobrodsky surface mine; the “Prirezka” area at the Chernigovsky surface mine; a number open-pit areas at the underground mines; etc. The main factors complicating the involvement in the development of new sites are: the presence of residential areas, industrial buildings and structures near the boundaries of the mining area; power supply lines, transport communications, which limits or excludes the production of mass explosions in the preparation of overburden for excavation; limited size or lack of areas for external dumps at a short distance from the site (in some cases, it is possible to close the mined-out space of the worked-out quarry field). When designing the development of areas characterized by such conditions, it is necessary to consider the application of new technical and technological solutions.
Highlights
When limiting or excluding the use of mass explosions, it can be orientated to the domestic or foreign equipment that allows digging out strong rocks without blasting
The design takes into account a number of site features: - location in close proximity to the northern boundary of the Novokolbinsky power substation area, and along the eastern boundary of the Kemerovo – Anzhero-Sudzhensk regional highway; - availability of mined-out space, opening mine workings and a transport network away from the western border of the “Prirezka” section built during the mining of the Novokolbinskoe quarry field
When developing a section "Prirezka" overburden should be placed inside the quarry field, with minimum volumes of transportation of overburden to the external dump
Summary
When limiting or excluding the use of mass explosions, it can be orientated to the domestic or foreign equipment that allows digging out strong rocks without blasting. The design takes into account a number of site features: - location in close proximity to the northern boundary of the Novokolbinsky power substation area, and along the eastern boundary of the Kemerovo – Anzhero-Sudzhensk regional highway; - availability of mined-out space, opening mine workings and a transport network away from the western border of the “Prirezka” section built during the mining of the Novokolbinskoe quarry field.
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