Substantiation of blast-free technology for mining rockburst-hazardous bauxite deposits using hydraulic breakers

The article focuses on the problem connected with the low productivity, poor safety and increased cost of mining of rockburst-hazardous bauxite deposits in the Northern Ural. The factors that affect productivity, safety and cost of mining are identified. The geological and geotechnical conditions of bauxite mining in the Northern Ural are analyzed. The figures of performance and cost of the mining process flow currently in use are determined. The most competitive methods of mining rockburst-hazardous deposits are reviewed, and the equipment for the high production ore breaking in the given mining conditions is determined. The range and experience of hydraulic breakers in surface mining and in underground tunneling are discussed. The method is developed to determine capacity of hydraulic breakers with regard to strength characteristics of rocks and operating parameters of equipment. The hydraulic breaking flowchart algorithm is developed. The ore breaking flow chart using hydraulic hammers enhances stoping efficiency at optimal operating costs. The developed flowsheet of blast-free mining of rockburst-hazardous bauxite deposits includes hydraulic breaking of ore with the cyclic-and-continuous technology. The proposed flowsheet ensures the highest mining safety and production capacity at reduced operating cost.

Keywords: underground mining, rockburst-hazardous deposits, blast-free mining, blast-free technology, hydraulic breaker, hydraulic ore breaking, process flowsheets, numerical studies.
For citation:

Kholmskiy A. V., Fomin S. I. Substantiation of blast-free technology for mining rockburst-hazardous bauxite deposits using hydraulic breakers. MIAB. Mining Inf. Anal. Bull. 2022;(7):40-54. [In Russ]. DOI: 10.25018/0236_1493_2022_7_0_40.

Acknowledgements:
Issue number: 7
Year: 2022
Page number: 40-54
ISBN: 0236-1493
UDK: 622.063.4
DOI: 10.25018/0236_1493_2022_7_0_40
Article receipt date: 22.12.2021
Date of review receipt: 03.05.2022
Date of the editorial board′s decision on the article′s publishing: 10.06.2022
About authors:

A.V. Kholmskiy1, Graduate Student, e-mail: chelmick@yandex.ru, ORCID ID: 0000-0003-1311-0949,
S.I. Fomin1, Dr. Sci. (Eng.), Professor, e-mail: fomisi@mail.ru, ORCID ID: 0000-0002-0939-1189,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

 

For contacts:

A.V. Kholmskiy, e-mail: chelmick@yandex.ru.

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