Authors: E.I. Nurgaliev, A.E. Mayorov

Title of the article: Physical and mechanical properties of specialized cement mixtures for integrated isolation of mine workings

Year: 2018, Issue: 4, Pages: 50-55

Branch of knowledge: Earth sciences

Index UDK: 622.455, 622.822.3, 624.136.6

DOI: 10.26730/1999-4125-2018-4-50-55

Abstract: Efficient methods were reviewed for construction of isolating structures for underground coal mine workings in the conditions of broken enclosing rock. One of the promising methods is a combined method based on the technological combination of the construction of the stopping body and the consolidating and compacting grout curtain with changing of physical and mechanical properties of the broken rock and creation of structural bonds with border area of rock. This article presents the analysis of physical and mechanical properties of new specialized cement mixtures UGM and UGM-P. The evaluation is given of their influence on the quality and efficiency of the technology of coalmine isolation by the monolithic stopping – grout curtain system, which has been developed and applied in Kuzbass coalmines. The study gives justification of the efficiency of consolidating isolating systems, which have been constructively integrated in the destroyed enclosing rock strata and controlled its physical and mechanical state. The results of large-scale studies performed in the period from 2012 till 2018 are presented. In choosing rational parameters of the technology, it is important to take into consideration the nonlinear dependence of uniaxial compression strength and bend strength on water-solid ratio of the grouts which is based on PC-500 cement, solid industrial waste of heat electric plants and metallurgical companies of Kuzbass.

Key words: cement mixtures isolation stopping border rock massif injection grout curtain consolidation compaction

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