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DEVELOPMENT OF DEPOSITS
ArticleName Technology for extraction of abandoned undermined sylvinite layer IV at Belaruskali Mine Management 3
DOI 10.17580/gzh.2018.08.09
ArticleAuthor Petrovsky A. B., Golovaty I. I., Gubanov V. A., Polyakov A. L.
ArticleAuthorData

Belaruskali, Soligorsk, Belarus:

I. I. Golovaty, Chief Executive Officer
A. B. Petrovsky, Deputy Chief Engineer of Mining Operations

 

Institute of Mining, Soligorsk, Belarus:
V. A. Gubanov, Chief Researcher, Doctor of Engineering Sciences
A. L. Polyakov, Director, Candidate of Engineering Sciences, sigd@list.ru

Abstract

The original project of mining at the Starobin potash salt deposit assumed top-downward extraction of reserves from potash seam III composed of fours sylvinite layers, starting from upper later IV. However, because of organizational and technological reasons, the project sequence of mining was put aside, mining started from the lower-lying layers, and undermined layer IV holding nearly 100 Mt of potash reserves was abandoned. At the present time, 25 years later, it is required to find and justify safe mining technology for abandoned undermined sylvinite layer IV. In order to reach the objective, specialists of the local Institute of Mining were engaged into creative cooperation with Belaruskali’s practitioners. The studies began in 2011 and had two stages. At the first stage, by means of exploratory headings (total length of 600 m), rock mass disturbed by the lower-lying mine was examined, and feasibility of safe mining of sylvinite layer IV was determined. At the second stage, again using exploratory headings (total length of 650 m), detailed geomechanical research was carried out, which identified optimal zones for developing entries and subsequent efficient extraction of the abandoned reserves from layer IV. Based on the accomplished research, the mining technology for the sylvinite layer was developed. During preparation of an extraction panel for mining, special-purpose headings were driven: haulage, conveyor, ventilation and erection. Concurrently, face area support was selected as K-12 support manufactured in Belarus. In the course of the technology application (round a year), more than 1.3 Mt of ore have been produced and the first extraction panel has been worked out.

keywords Roof bolting, developing entry, slice mining, heading and support, undermining, overmining, longwall equipment, erection drift
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