Study on microseismic monitoring of height of water flowing fracture zone
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Abstract
Based on microseismic monitoring results of the working face water flowing fractured zone development, the authors analyzed the spatial distribution characteristic of microseismic events and the quantitative characteristics in vertical direction. The relationship between the spatial distribution characteristics and the number of seismic events and height of water flowing fracture zone has been analyzed. A numerical simulation was performed to study height of water flowing fracture zone with FLAC3D by contrast. The research results have shown that microseismic monitoring has been proved to be of high positioning accuracy. The plane position of microseismic events mainly concentrated in the goaf and near the extraction opening, vertical position of microseismic events is mainly concentrated in the 110m above the coal roof, above of which, the number of microseismic events drastically reduced; the numerical simulation results agreed with the results of microseismic monitoring; the analysis result provides a new method for microseismic monitoring of height of water flowing fracture zone.
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