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A method is proposed to control misalignment of boreholes drilled in parallel to one another for the purpose of stress measurement in rock mass. The method includes the analysis of displacements of the measurement hole boundary along different orientations of a strain gauge during step-by-step loading of the disturbance hole boundary. This method allows determining the angle of possible horizontal or vertical offset of axis connecting the hole centers. The calculated offset angles are compared with the actual tacheometric survey data on the center coordinates of holes.

A comparative analysis of strength characteristics of rocks in the thawed and frozen states for new pilot holes 309, 310 of kimberlite pipe Mir was carried out. The values of physical and mechanical characteristics under study are presented.

A multi-channel measuring and computing system consisting of four sensors was in operation at the open pit of Zarnitsa diamond pipe in 2019 and 2020. In 2019, intensive mining operations were carried out at the open pit. The sensors recorded dynamic changes in the width dimensions of fault zones. After temporary closing down of mining operations in the beginning of 2020, the widths of fault zones changed smoothly with positive and negative trends, which indicated an increase in the stress state of rock masses. These changes exceeded the values when mining operations were conducted. It is found that dynamic effects reduce the stress state of rock masses.

The algorithm for seismic tomography of coal-bearing solid mass is developed and embodied in software. It allows evaluating the type and parameters of geological disturbances. When seismic exploration is used, the type and characteristics of disturbances are determined by analyzing the distribution of deviations in kinematic, dynamic and spectral parameters of the wave field from their background values in the plane of extraction panel area under study.

Based on the results of mine geophysical surveys of coal pillars using the ANGEL-M system with the function of electrometric mine equipment and numerical modeling of the stress-strain state of a rock mass, an empirical dependence of the relative intensity and vertical stresses in pillars was obtained when mining thick coal seams. Design solutions for the prevention of geodynamic phenomena are developed using the stress index of the rock mass.

Propagation of a plane electromagnetic wave of the microwave range in a coal seam with hydraulic fracture is simulated. The coefficient of its reflection from the “coal-fracture with proppant” interface is calculated taking into account the variation of probing signal frequency and electromagnetic properties of the material filling the fracture.

The given research paper reviews tensed and deformed condition around the cavity, disposed on definite depth in resilient viscous-plastic quarter space under the dynamic pressure by the daylight surface. To solve the problem, it is necessary to construct mechanic-mathematical model using system in differential equations in private derivative first-order of hyperbolic type, which can be solved by the usage the numerical method of S. K. Godunov, named “gap disintegration”. The received numeric solving of the above mentioned task can be used in projecting and constructing the minefields, underground constructions and other objects.

According to the results of seismicity monitoring in Kuzbass, it is determined that the strongest seismic activations of the subsoil in the area of coal workings occur as short-term activations lasting one to two months. Similar activations occur more frequently at other objects. Induced seismicity in Mountain Shoriya is considered. The effect of partial synchronization of seismicity development was discovered at Kazsky, Sheregeshsky, and Tashtagolsky, mines located hundreds kilometers apart. No such synchronization is observed at open-pit and underground coal mines.

The results of influence exerted by technogenic and natural deformation effects on the resonance response in seismoacoustic and electromagnetic fields are presented and possibility of its use to control the stress-strain state in geotechnical systems is studied. This research aims at increasing the information level of the method for recording natural electromagnetic radiation to monitor the stress-strain state in railway tunnels. Experimental work is carried out to record electromagnetic radiation when electric trains passed the tunnels in areas with different engineering and geological conditions and depths.

The results of a numerical study of reservoir properties of coal samples containing fracture systems are presented. Coal thin polished specimens are used as a source of crack systems. The problem of fluid filtration in cracked coals is numerically solved by the finite element method. The influence of fracture system geometry on the filtration properties of geomedium is demonstrated.