Authors: T.A. Tyuleneva, R.I. Shishkov

Title of the article: Improving the technology of opening shallow coal seams using the open-underground method

Year: 2021, Issue: 4, Pages: 96-110

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

Index UDK: 622.333:622.275

DOI: 10.26730/1999-4125-2021-4-96-110

Abstract: In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On the one hand, the volume of coal remaining outside the cut contour and economically impractical for open-pit mining is increasing. On the other hand, when using underground mining geotechnology, the cost of mining exceeds the cost of performing mining operations using open-pit geotechnology, this is due to differences in the operating factors of the section and the mine. This circumstance determines the use of open-underground technology for mining coal reserves outside the contour of the section as an actual and promising direction.
To solve the problem of optimizing the development of coal mining, it is advisable to switch to a balanced application of combined field development technologies, which involve the use of the developed section space as the main opening development.
This article describes a methodology based on the use of rational technological schemes for the preparation and treatment of reserves of powerful shallow coal seams, substantiating the parameters of combined geotechnology with a coordinated and balanced development of open and open-underground mining operations, characterized by a rational distribution of reserves for open and open-underground mining of coal reserves beyond the limit contour of the section with the preparation of excavation sites directly from its workings, while coordinating the production capacity and development rates of open and open-underground work, ensuring the specified deadlines for timely repayment of underground workings for safe internal dumping of overburden in the developed space of the section. The opportunities for open-pit mining in the combined development system are expanded by eliminating the need for a single trench, as a result of the balance of production capacities of open-pit and underground mining with the calculation of the division of total reserves in the boundary of the mining allotment for open-pit mining. Its application will increase the production capacity of the coal mining complex without additional environmental burden and will provide an increased return on investment

Key words: open-underground method shallow layers combined geotechnology geomechanical parameters

Receiving date: 22.06.2021

Publication date: 15.09.2021

CITE DOWNLOAD