In this paper we compare some results of a few methods estimating of attenuation of seismic (AE) waves energy in front of mining longwall at the "Bobrek-Centrum" coal-mine. The methods use the routinely observed AE energy and estimate the a value applying more or less simplified attenuation relation and assumptions on the distribution of AE sources in the longwall. The results although preliminary look very promising and are confirmed with an analysis of mining and geological situation.
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