An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions

Table 15

IMF component energy percentage for selected effective microseism signals by EEMD.

IMF components	Working condition 29; (%)	Working condition 35; (%)	Working condition 37; (%)	Working condition 41; (%)	Working condition 47; (%)
IMF_h1	66.8	80.3	10	85.4	55.9
IMF_h2	15.6	10.4	11.3	13.6	42.4
IMF_h3	14.2	5.74	61.2	0.49	1.23
IMF_h4	2.88	3.05	16.3	0.311	0.293
IMF_h5	0.222	0.374	0.959	0.0857	0.0826
IMF_h6	0.115	0.0826	0.146	0.0317	0.0314
IMF_h7	0.0434	0.0449	0.0343	0.016	0.0161
IMF_h8	0.0249	0.0198	0.0222	0.0088	0.00861
IMF_h9	0.0356	0.00868	0.00808	0.00421	0.0042
IMF_h10	0.0218	0.00266	0.00393	0.00286	0.00213
IMF_h11	0.0113	0.000972	0.00388	0.00128	0.0012
IMF_h12	0.00279	0.000577	0.00114	0.000586	0.000455
IMF_h13	0.000226	0.000359	0.00086	0.000305	0.000322
IMF_h14	0.000126	0.000242	0.00114	0.000217	0.000105
IMF_h15	0.00023	0.000248			0.000184
IMF_h16	0.000115		—		—
IMF_h17	0.000104	—	—	—	—