Comparison of Seismoacoustic and Seismological Energy-Frequency Distributions in a Coal Mine

摘要

The seismoacoustic and seismological energy-frequency distributions were compared in one coal block of a coal mine. It was shown that seismoacoustic monitoring extends the measured band towards the small seismic events, below 20 J, which is the threshold of seismologic monitoring in the area. The seismoacoustic energy-frequency (E-F) distribution consists of at least two independent distributions, formed by seismic events from coal seam and coal roof, respectively. The total E-F distribution represents the weighted average of both distributions. By evaluating the total E-F distribution line slope it is possible to determine only the ratio between the coal seam and the coal roof seismic activity.