A Comparison of Mine Seismic Discriminators Based on Features of Source Parameters to Waveform Characteristics

Figure 2

Two typical seismic source processes in mines, blast (a) and shear fracturing (b) (Malovichko 2012). Radiation pattern of an idealized explosion and of a strike-slip earthquake along a vertically dipping fault are shown correspondingly (Bormann, 2002). The arrows show the directions of compressional (outward, polarity +, red shaded) and dilatational (inward, polarity −, green shaded) motions in P-wave.

(a)

(b)