Makeyev S.Yu., Andreyev S.Yu., Ryzhov G.A. Reduction of outburst risk through improved uniformity of the rock crack-block structure

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 127

 

Geoteh. meh. 2016, 127, 67-76

REDUCTION OF OUTBURST RISK THROUGH IMPROVED UNIFORMITY OF THE ROCK CRACK-BLOCK STRUCTURE 

¹MakeyevS.Yu., ¹AndreyevS.Yu., ¹RyzhovG.A.

¹IGTM NAS of Ukraine 

UDC 622.831.325

Abstract. The aim of this work was to establish principles for controlling the stress-deformed and gas-dynamic state of the rock mass in terms of physical-and-chemical mechanics in order to improve safety and efficiency of the mining technologies. It is possible to solve this problem by selecting proper composition and concentration for the injected plasticizing or hardening solutions which penetrate into the cracks under the great pressure and restore the disturbed equilibrium stress state. It is stated that, in order to improve uniformity of the crack- block structure of the outburstprone rocks and prevent them from turning and displacement deformations, it is necessary to affect the rocks beforehand with the aim to suppress these processes. In this sense, at the micro level, the PCT of the rock allows to reduce the environment proneness to the gas-dynamic phenomena thanks to the involvement of plasticized sectors into the process of brittle fracture and, at the macro level, thanks to the filling of the interconnect space by hardening chemical composition, resulting in better uniformity of the rock mass. Scientific novelty of the findings is validating of the two models  of impacting on the rock mass, which can be realized both through preventing of the block displacement and turning in the mass under the influence of long-range and long-term stresses, and through smoothing shear and torsion of structural rock crystals relatively to each other. These findings can be used for preventing gas dynamic effects during the coal mining.
Keywords: gas-dynamic phenomenon, physicochemical treatment, swelling, plasticizing, hardening.

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About the authors:

Makeev Sergey Jurievich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in the Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Andreev Sergey Jurievich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Principal Engineer in the Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Ryzhov Gennadiy Alexandrovich, Master of Science (M.S), Junior Researcher in the Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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