Seismoacoustic Method for Assessing the Seismic Energy Absorption Coefficient on a Mining Longwall Panel Length-A Case Study
J. Kurzeja
Central Mining Institute, Katowice, Poland
Keywords: coal seam, attenuation, absorption coefficient, seismic hazard
Abstract
The article presents a case-study of change in the seismic energy absorption coefficient with changing mining and geological conditions during the exploitation of one of the longwalls at the Polish coal mine Ruda. Several stages of longwall excavation exploitation, differing in stress conditions, were selected for the analysis. The results obtained show that low attenuation occurs in areas of high stress concentration and, conversely, high attenuation is associated with the weakening of the rock mass.
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