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CONTRIBUTION OF THE NORTH-EASTERN FEDERAL UNIVERSITY TO DEVELOPMENT IN THE MINERAL MINING INDUSTRY AND PERSONNEL TRAINING
THEORY AND PRACTICE OF DEVELOPMENT OF DEPOSITS
ArticleName Process design of mining underneath the permafrost layer at Badran deposit
DOI 10.17580/gzh.2016.09.09
ArticleAuthor Petrov A. N., Alekseev A. M., Kolesnikov S. G., Petrov D. N.
ArticleAuthorData

Ammosov North-Eastern Federal University, Yakutsk, Russia:

A. N. Petrov, Head of a Chair, Candidate of Engineering Sciences
A. M. Alekseev, Senior Lecturer

 

Zapadnaya Gold Mining Limited, Yakutsk, Russia:
S. G. Kolesnikov, Head of Technological Department

 

Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia:
D. N. Petrov, Researcher, Candidate of Engineering Sciences, petrovdn74@mail.ru

Abstract

This article describes technological schemes of accessing, development and stoping at lower horizons of Badran gold ore deposit in Yakutia. The underground mining experience is discussed. It is found that strength properties of enclosing rock mass drop with mining transition to deeper levels due to higher temperature and moisture content of rocks. A scheme is proposed for gaining access to lower horizons via an inclined shaft at an angle of 8–10°. The included self-propelled equipment allows higher productivity of labor owing to better capacity, mobility and multifunctional performance. In order to improve geomechanical conditions, in-stone development of ore body is recommended, with location of haulage drifts in stable foot wall rocks. Drivage of development drifts in stronger enclosing rocks will reduce the cost of support and maintenance and will abate the risk of accidents due to the infl uence of stoping. The main mining system is room-and-pillar mining with reinforcement and dry rock fill. For ore body areas of increased thickness, a variant of slicing with concrete floor construction is off ered. The specified stoping design allows mining with minimum loss and dilution. In general, the recommended technological solutions on extraction of ore reserves underneath permafrost levels at Badran deposit are aimed at improving effi ciency of mining in the sever environment of the Extreme North.

keywords Levels under the permafrost, rock strength properties, access scheme, in-stone development, support with reinforcement and dry rock fill, stoping parameters
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