Authors: S.M. Miliy

Title of the article: Evaluation of technology for development of inclined and steep coal deposits in Kuzbass

Year: 2020, Issue: 1, Pages: 45-73

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)

Index UDK: 622.271.3

DOI: 10.26730/2618-7434-2020-1-45-73

Abstract: In the practice of Kuzbass open-pit mining, two systems of mining according to V.V. Rzhevsky's classification are used or were mainly used for the development of inclined and steep formations: single- or double-flank deepening longitudinal system. These technologies are based on the application of traditional equipment, and the moving of overburden from the face to the dump was carried out by quarry dump trucks and railroad transport. The analysis of the main indicators of coal-mining enterprises of Kuzbass, working out inclined and steep slope deposits, shows that the cost of extraction of 1 ton of coal annually increases on average by 5% with simultaneous deterioration of coal quality due to increased dilution by the rock. Despite the supply of new models of excavators, transport and drilling equipment to the Kuzbass mines, the efficiency of open-cast coal mining is constantly decreasing. This situation is explained by the mismatch between the used machinery and technology and the conditions of coal seams bedding. The peculiarity of the currently applied technology is mining of deposits with benches, the number of which increases with deepening of mining operations. As a rule, the initial front of works is created by opening-up and preparation for excavation of the thickest coal seams of the formation. In this case, the remaining seams of the formation are mined along the way in case of theirs random presence in excavator stope. In this article the analysis of existing technologies of development of inclined and steep seams is carried out, the methodology of estimation of technology of open-cast mining by criterion of resource expenses is resulted, and also the brief review of application of the transportless technology at longitudinal system of development on gentle-falling formations deposits is made.

Key words: open pit mining inclined seams steep seams mining system transportless technology

Receiving date: 10.01.2020

Approval date: 17.02.2020

Publication date: 05.05.2020

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