Authors: M.V. Shinkevich

Title of the article: Development of hierarchy of geostructures in the containing massif at working off of coal layer the long clearing face

Year: 2019, Issue: 3, Pages: 44-53

Branch of knowledge: 25.00.20 Geomechanics, rock destruction by explosion, mine aerogasdynamics and mining thermal physics

Index UDK: 622.831.2

DOI: 10.26730/1999-4125-2019-3-44-53

Abstract: Relevance, purpose of work: geomechanical processes occurring during coal mining and encompassing significant volumes of rock massif form intense gas flows both into the open space and to the surface, causing the gas hazard of mines and land structures. Examining the processes in the array perturbed by mining will allow to predict their consequences and reduce possible risks.
Research methods: using the methods of mine gas dynamics, the nonlinearity of changes in the methane abundance of the excavation site with a period of disproportionately greater than the collapse step of the main roof is shown. The basis of periodic changes in methane release is the nonlinearity of geomechanical processes. The analysis of pressure measurements in the racks of mechanized supports in lavas was performed. The results of mathematical modeling of geomechanical processes were compared using the finite element method and the developed parametric model.
Results: based on the known regularities of the development of the hierarchy of geostructures, a parametric model of geomechanical processes in the rock massif has been developed taking into account the realization of the elastic energy of the massif during the movement of a long clearing face. The results of the study of the manifestations of rock pressure in the racks of the sections of mechanized supports are presented. The convergence of the parametric model with the results of mathematical modeling of geomechanical processes using the finite element method is estimated. It was determined that the nonlinear technogenic structurization of the host rock mass has a single pattern for both millions of tons of rocks in the area of influence of a long working face (established by mine aerogasdynamics methods) and for hundreds of tons in its immediate vicinity (established by pressure geomechanics methods on the mechanized roof support section and numerical simulation).
This work was supported by the Russian Foundation for Basic Research, project №18-45 420001 .

Key words: Geomechanics mine gas dynamics rock mass elastic energy technogenic structurization process model long clearing face methane abundance mathematical modeling

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