Features of new sites designing on quarry fields of the existing open pit mines of Kuzbass

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.

Study of the impact of the open pit productivity on the economic indicators of mining development

“…The creation of normal working conditions for a open-pit for various ore productivity options, within the maximum possible value, is possible by changing the width of working benches [37,38], which ensures the standard of reserves ready for excavation. At the same time, an increase in the width of working benches leads to a decrease in the number of working benches within the deposit and, accordingly, to a change in the length of the mining front, both in ore horizons and in overburden, which largely determines the distance of transporting the rock mass in the openpit.…”

Monitoring and Analysis of Dynamic Response for Open-Pit Mine with Inside Inclined Shafts under Train Loading

“…For a long time, many scholars have explored the deformation and stability of slopes in increasing depth [12][13][14][15]. The exploration results show that during the mining process, the geological environment conditions change, especially the blasting operations in mining activities, artificial activities, and geological structure changes such as rock faults and stable structural surfaces with more developed fracture joints have a greater impact on the stability of slopes [16][17][18][19][20]. Therefore, it is important to monitor the stability of slopes and inclined shafts in open-pit mines [6,9].…”