Authors: B.N. Zarovnyaev

Title of the article: Impruvement of continuous development systems in permafrost

Year: 2021, Issue: 6, Pages: 63-69

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

Index UDK: 622.271.3 (571.56)

DOI: 10.26730/1999-4125-2021-6-63-69

Abstract: With open-pit mining, the issue of environmental safety becomes paramount. As you know, the development of deposits in the permafrost zone causes thawing of frozen rocks and deformation of the pit walls, sinkholes, collapse of dumps, which is a hidden phenomenon and therefore more catastrophic. When developing deposits in permafrost conditions, it is advisable to reduce the disturbance of the landscape during the development of deposits. The experience of developing horizontal and shallow coal deposits by small open-pit mines showed extensive disturbances to the landscape and their accumulation in large quantities, as well as subsequent disturbances as a result of the melting of dumps, which leads to the withdrawal of areas from farmland and deterioration of the ecological state of mining areas. In this regard, the improvement of open pit mining in permafrost conditions, including the development of environmentally friendly technologies, is highly relevant.The aim of the work is to develop environmentally friendly technologies for conducting mining operations with internal dumping and improve continuous development systems, taking into account the geocryological operating conditions of horizontal, shallow coal and placer deposits. The results of the performed studies of the permafrost-cryogenic state of the mining conditions made it possible to develop new technologies for conducting mining operations with internal dumping, ensuring the safety of internal dumps, rock mass, walls of quarries in a frozen state (patents Nos. 1677317, 2215148, 2206747, 2740892), which is development. The developed options for continuous development systems, taking into account the specifics of the permafrost massif and the use of technologies for protecting dumps, rock mass, and quarry sides from thawing, are fundamentally new technological solutions in the development of coal seams, placer deposits and provide simultaneous reclamation of the worked-out area, placement of internal dumps with protection from thawing and ensure the environmental safety of open pit mining.

Key words: permafrost thawing open pit mining continuous development systems internal dumping environmental safety

Receiving date: 15.09.2021

Approval date: 05.12.2021

Publication date: 24.12.2021

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