ANALYSIS OF THE MAIN PARAMETERS OF LOW-AMPLITUDE FAULT DISTURBANCES IN COAL SEAMS AND SPATIAL IMAGE OF THE DISPLACER SURFACE

Abstract

Purpose. Carrying out a statistical analysis of the main parameters of low-amplitude discontinuous disturbances in a coal seam and restoring a spatial image of the disjunctive mixer surface. Methodology. Based on the results of a statistical sampling of data on small-scale disturbances of the coal seam, obtained directly from the field diary of the chief geologist of the mining enterprise, a classification of discontinuous disturbances of the coal seam by types, angle, dip azimuth and amplitude was made. A comparison was made of the recorded faults in the layers located at a small distance from each other, which made it possible to reproduce the spatial position of the fault and build the surface of its displacement. Results. Statistical data processing has shown that the majority of all faults are normal faults, and the dip angles of their faults range from 55 to 75º, while the dip azimuth of almost half of fault fault faults lies in the range of 0 – 100º. It can be seen from the distribution of the amplitude of disturbances that its indicator in the vast majority of tectonic discontinuities does not exceed 2 meters and, according to the conditions for the possibility of crossing discontinuities by clearing operations, such discontinuities pass with undercutting of side rocks by combines, which reduces the rate of feat and increases equipment wear. Originality. Comparison of faults recorded in formations located at a small distance from each other showed that their main parameters are very different at different horizons, due to which the spatial arrangement and the surface of the disjunctive mixer has a very complex shape, which does not allow predicting the location of the fault by simple geometric transfer from one layer to another. Practical value. The results obtained allow us to establish that the most common amplitude of tectonic faults is in the range from 0 to 2 m, the parameters of the same faults can change at different horizons, and the surface of the fault mixer is a complex geometric shape, which makes it impossible to simple transfer of the fault line from the upper to the lower layer, but requires the use of more efficient methods for predicting faults.