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BELARUSKALI JSC
ArticleName Implementation of freezing-on-demand concept in shaft construction in Belaruskali’s Darasinsky Mine
DOI 10.17580/gzh.2023.08.05
ArticleAuthor Golovaty I. I., Levin L. Yu., Semin M. A., Pugin A. V.
ArticleAuthorData

Belaruskali JSC, Soligorsk, Belarus:

I. I. Golovaty, CEO

Mining Institute, Ural Branch, Russian Academy of Sciences, Perm, Russia

L. Yu. Levin, Deputy Director of Science, Doctor of Engineering Sciences, Corresponding Member of the Russian Academy of Sciences

M. A. Semin, Head of Laboratory, Doctor of Engineering Sciences, seminma@inbox.ru
A. V. Pugin, Researcher, Candidate of Physical and Mathematical Sciences

Abstract

The article analyzes the current approaches to artificial ground freezing control during shaft construction in mines. The earlier freezing-on-demand concept is added with some basic strategies and principles. The application of the concept is described as a case-study of shaft construction in a potash mine in the Republic of Belarus. Some features of ground freezing during construction of two mine shafts are defined and analyzed. The most interesting engineering solutions toward the improved safety and energy efficiency of shaft sinking are presented. These solutions include the introduction of the interval sinking permit, which allows earlier start of heading operations in both shafts, and the introduction of a certain package of actions governed by the presence of a fluid flow in one of the rock layers meant for freezing. The developed package of actions allowed the skip shaft sinking without any accident risk and violation of work schedules. Advanced drilling during shaft sinking showed lack of water in rocks. With the package of actions implemented, the shaft sinking and lining was successfully completed in a complicated interval of the section, and, later on, the shaft waterproofing and the adjacent rock consolidation were accomplished. On the whole, the implementation of the freezing-on-demand concept ensured saving of energy supply in frozen wall formation around two shafts more than 3 MkW·h.
The study was supported by the Russian Science Foundation, Project No. 19-77-30008.

keywords Artificial ground freezing, frozen wall, control system, thermal control boreholes, potassium mines
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