Serhii Musiienko, Tetiana Palamarchuk, Liliia Prokhorets, Volodymyr Kurinnyi. Scientific and technical aspects of grouting of marginal rocks of mine workings

Details

Parent Category: Geo-Technical Mechanics, 2020

Category: Geo-Technical Mechanics, 2020, № 154

Geoteh. meh. 2020, 154, 162-171

https://doi.org/10.1051/e3sconf/202016800057

 

SCIENTIFIC AND TECHNICAL ASPECTS OF GROUTING OF MARGINAL ROCKS

OF MINE WORKINGS

¹Serhii Musiienko, ¹Tetiana Palamarchuk, ¹Liliia Prokhorets, ²Volodymyr Kurinnyi

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, ²National Technical University "Dnipro Polytechnic" of the Ministry of Education and Science of Ukraine

Language: English

Abstract. The goal of the paper is to justify ways to achieve maximum radius of extent of grouting mortar in a rock massif and to maximize filling of cavities and cracks with minimal openings. Filling of cavities and cracks directly influences a "massif – roadway – safety structure" system. Some scientific and technical aspects of grouting and injecting inorganic binders into marginal rocks are considered. Advantages of usage of triple plunger pumps in injecting units are determined. The influence of pulsation on a condition and process of grouting mortar extension is justified. It is established that under equal operating conditions, pulsations created by a triple plunger pump reduce mortar viscosity by 15 %, and a radius of extent of mortar based on grouting cements is increased by an average of 12 %, and with usage of very finely dispersed substances – up to 20 %. Suggested recommendations significantly improve the technology of grouting of marginal rocks and concrete structures.

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