Estimation Of The Physical-Mechanical Properties Of The Rocks On The Degree Of Coal Metamorphism

This article discusses the physical-mechanical properties of Karaganda basin coal seam wall rock, depending on the degree of metamorphism, which is determined by a maturity parameter of the reflectivity of organic matter - vitrinite. This method is significant in connection with the increase of geological exploration for coal, as well as methane, in connection with the preparation of new minefields at deep depths, when the coal core is the only substance to determine the properties of coal and their rocks. The determination of the physical and mechanical properties of coal seam wall rock, taking into account the stage of coal metamorphism, is great practical importance in the mining industry. Based on previous years' materials and laboratory data, which we conducted together with our Chinese colleagues in the State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing, China), and based on M.A. Ermekov (1990) mathematical model of metamorphism describes the degree change of coal metamorphism and physical-mechanical properties of coal seam wall rock by a depth. This research contributes to the solution of problems related to the roof stability of coal seams in mines since the physical and mechanical properties of rocks are one of the main criteria for mining and technical works.