Digital model for predicting spatial variability of physical and mechanical properties of coal massive

This paper focuses on building a digital model that reflects the variability of the physical and mechanical properties of the Elginskoye deposit. The initial data came from electronic databases compiled from geological and operational exploration reports. The Orange software package was used to create a geological model of the coal-bearing rock mass of the Elginskoye deposit. Block 3D models of the variability of physical and mechanical properties such as compressive strength, tensile strength, and density of carbon-bearing rocks in stratigraphic intervals at depths U6–U5, U5–U4, U4–H16, and H16–H15 were constructed. Modern computer technologies are able to visualize the values of physical and mechanical properties corresponding to each point of a twodimensional cross-section of a geological body. Rather than constructing a complete three-dimensional digital model to assess the structure and condition of the rock mass, an approximation can be constructed using twodimensional cross-sections, which clearly and informatively display the spatial variability of one of the physical and mechanical properties. An example is given of hypsometric plans for the distribution of rock strength under tension, compression, and bulk density at the depth of the surrounding rocks, in the interlayers U6–U5. Interlayer strength was measured at intervals ranging from 0.4 m to 1 m in depth, thereby identifying changes in the physical and mechanical properties of the rock both with depth and laterally. The presented plans demonstrate a significant variability in the strength and density properties of the rock. The strength limit of rocks under uniaxial compression, within the studied intervals, varies from 20.5 MPa to 129.9 MPa, the strength limit under uniaxial tension, from 2.64 MPa to 11.3 MPa, and the bulk density varies from 2.45 g/cm 3 to 2.81 g/cm 3 . The results of the research can be used to design and plan the development of the deposit, as well as to draw up specifications for drilling and blasting operations, taking into account the variability of the properties of carbon-bearing rocks.