Authors: S.S. Tsibaev, A.A. Renev, S.I. Kalinin, D.V. Zorkov, K.A. Filimonov

Title of the article: The results of evaluation of the flood effect on bolts stability and surrounding massif deformations

Year: 2018, Issue: 1, Pages: 37-45

Branch of knowledge: Earth sciences

Index UDK: 622.268.6 (281.742.2)

DOI: 10.26730/1999-4125-2018-1-37-45

Abstract: The study presents the results of an instrument and visual assessment of the condition of mine workings, peripheral rock strata and anchor support elements exposed to flooding and subsequent drainage under conditions of Raspadskaya mine. The extent and term of the mine being under flooded condition has been determined. The results of the durability tests of anchoring rods of various profiles fixed in the roof and sides of the mine workings are given. It has been found that distribution of probability of the holding force of the anchors in blast-holes in the roof of the mine working follows the normal law of distribution. The results of the roof radar survey taken by georadar OKO-2 have been analyzed. It has been identified that the height of rock strata sheeting in the roof of the mine working varies between 0.2 to 2.25 m; comparison to the theoretical height of the roof arch has been made. The assessment of the coal rock massif liability to water saturation has been made, the height of water saturation of the roof rocks has been determined. It has been found that that the height of water saturation depends on the rock rigidity arch formed during the time of test. It has been determined that rocks saturation with water leads to decrease in specific cohesion of the binding material of chemical capsules with the borehole walls by 8085 % and by 49 % in the roof and sides respectively.

Key words: underground mining maintenance of mine workings rock bolting flooding explosion rock rigidity

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