APPLICATION OF GEOPHYSICAL WELL LOGGING DATA TO ASSESS THE PHYSICALMECHANICAL PROPERTIES OF ROCKS

This article discusses geophysical methods, as a geological tool, to determine the physical and mechanical properties of carbon-bearing rocks of the Karaganda coal basin.The mine fields of the Karaganda basin are distinguished by the complexity of the geological conditions, the variability of the technological characteristics of the coal, and the physical and mechanical properties of the coal-bearing rocks, both in the area of the basin and with the depth of the coal seams.In connection with this, the requirements for studying the composition and physical and mechanical properties of carbon-bearing rocks are increasing.From the above, the problem of developing the scientific foundations of creating methods for predicting the structure, composition, and physical and mechanical properties of an array of rocks with the use of a systemfactor analysis of the formation and transformation of coal formations becomes topical.This will allow raising to a qualitatively new level the assessment of the physical and mechanical properties and the prediction of the stability of the rocks roof in the mine workings.To achieve the goal, we used such geophysical parameters, as ρкelectrical resistance of rocks, dborehole diameter reflecting the physical state of the rock mass to characterize the physical and mechanical properties and the stability of the roofs of the coal seams.As a result, multidimensional mathematical equations for typical rocks of the basinargillites, aleurolites, and sandstonesare derived, showing the relationships between their physical and mechanical properties and geophysical parameters.