Vol. 333 No. 11 (2022)
DOI https://doi.org/10.18799/24131830/2022/11/3840
CALCULATION AND HARDWARE BASE FOR GEOMONITORING THE STATE OF THE ARRAY BY REGISTERING NATURAL ELECTROMAGNETIC RADIATION
The relevance of the study is caused by the need to develop a promising method for predicting the impact
hazard of the array according to the parameters of natural electromagnetic radiation that occurs during cracking in rocks. The existing methods of interpretation of geophysical monitoring data do not take into account the relationship of electromagnetic radiation parameters with the main geomechanical criteria determining the probability of a mountain impact: the concentration of stresses in the array and the location of their maximum.
The main aim is to establish rational parameters for further experimental substantiation of the criteria for local prediction of impact hazard by the electromagnetic radiation registration method based on the experimental equipment «Angel-M» developed at the MNC.
Objects: massifs of rocks prone to dynamic manifestations of mountain pressure at Kuzbass mining enterprises (Tashtagolskaya mine, depth 700 m; Ziminka mine, depth 300 m; mine no. 12, depth 340 m).
Methods: analysis of the physical mechanisms of electrification of rocks in the field of mechanical stresses based on the fundamental laws of solid state physics and electrodynamics, experimental and theoretical foundations of the method of recording electromagnetic radiation in laboratory and field conditions.
Results. The paper considers the physical prerequisites for electromagnetic radiation occurrence during the destruction of solids and rocks, the main theoretical and experimental results obtained in this field by leading scientific teams. A method for calculating the amplitude-frequency response of electromagnetic radiation during fracturing in rocks is described, including the solution of the wave equation, the forward and inverse Fourier transform, the effects of superposition of crack systems and electromagnetic radiation attenuation in a conductive medium. A promising method for predicting the impact hazard of an array by the electromagnetic radiation registration method is substantiated on the basis of complex criteria indirectly interrelated with the fundamental geomechanical parameters of the array (stress concentrations at their maximum point and the distance from the contour to this point): the average amplitude of pulses during the registration interval and the steepness of the pulse rate graph.
The main aim is to establish rational parameters for further experimental substantiation of the criteria for local prediction of impact hazard by the electromagnetic radiation registration method based on the experimental equipment «Angel-M» developed at the MNC.
Objects: massifs of rocks prone to dynamic manifestations of mountain pressure at Kuzbass mining enterprises (Tashtagolskaya mine, depth 700 m; Ziminka mine, depth 300 m; mine no. 12, depth 340 m).
Methods: analysis of the physical mechanisms of electrification of rocks in the field of mechanical stresses based on the fundamental laws of solid state physics and electrodynamics, experimental and theoretical foundations of the method of recording electromagnetic radiation in laboratory and field conditions.
Results. The paper considers the physical prerequisites for electromagnetic radiation occurrence during the destruction of solids and rocks, the main theoretical and experimental results obtained in this field by leading scientific teams. A method for calculating the amplitude-frequency response of electromagnetic radiation during fracturing in rocks is described, including the solution of the wave equation, the forward and inverse Fourier transform, the effects of superposition of crack systems and electromagnetic radiation attenuation in a conductive medium. A promising method for predicting the impact hazard of an array by the electromagnetic radiation registration method is substantiated on the basis of complex criteria indirectly interrelated with the fundamental geomechanical parameters of the array (stress concentrations at their maximum point and the distance from the contour to this point): the average amplitude of pulses during the registration interval and the steepness of the pulse rate graph.
Keywords:
Geophysical forecast, electromagnetic radiation, rock destruction, disturbance of natural electric fields, wave equation, Fourier transforms, amplitude-frequency response, hardware complex, shock hazard forecast, complex criterion
