Mine group working face mining mutual interference range calculation method based on microseismic monitoring

Abstract

The invention provides a mine group working face mining mutual interference range calculation method based on microseismic monitoring, and relates to the technical field of mine monitoring and data processing. The method specifically comprises the steps that 1, microseismic monitoring is distributed between two working faces of a mine group; 2, a top plate and a bottom plate are constructed and drilled, construction blasting is carried out on each rock stratum, and the wave speed of vibration wave propagation of each rock stratum is measured; 3, the coordinates and time of microseismic eventsare monitored in the mining process of the two working faces, and when the two working faces monitor the microseismic events generated by the same seismic source, the maximum origin time interval of the same seismic source is calculated; and 4, the proportion of the microseismic events in each time period range is counted in sequence, the spatial distance of two microseismic events in a determinedtime period group is calculated, and the maximum value is the mining mutual interference range of the working faces. By means of the method, the mining mutual interference range of the working faces.By means of the method, the mutual interference range of the two working faces of the mine group can be quickly and reasonably determined, and a basis is provided for reasonable optimization arrangement of the two working faces of a to-be-mined region in a mining area.

Description

technical field [0001] The invention relates to the technical field of mine monitoring and data processing, in particular to a method for calculating the mining mutual interference range of working faces of a mine group based on microseismic monitoring. Background technique [0002] For a mining area with a certain geological condition, under normal circumstances, the overlying rock strata will form collapse zones, fault zones and curved subsidence zones with the mining of coal, and the movement of the rock formations in the curved subsidence zone will affect the working face covered by it. The stress environment of coal body plays a macro control role. Practice has shown that when two working faces are in production at the same time in a local area of ​​the mine group, the mining activities of one of the working faces will cause the high-level roof of the goaf to bend and sink, and the overall effect of the thick and hard rock will cause the stress of the coal body in this ...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no direct and effective method to accurately determine the mutual disturbance range of the two working faces. It is necessary to provide a method that can calculate the mining disturbance range of the two working faces under different geological conditions, different development layouts and different mining design conditions. In the future, it will provide a basis for the rational and optimized layout of the two working faces in the area to be mined in the mining area, so as to realize the safe mining of coal

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