Discriminant Model of Coal Mining Microseismic and Blasting Signals Based on Waveform Characteristics

Table 1

Tests of equality of group means.

Characteristic variables	Lambda of Wilks		df1	df2	Sig.
Dominant frequency	0.427	131.674	1	98	0.000
Duration	0.654	51.917	1	98	0.000
Attenuation coefficient	0.701	41.775	1	98	0.000