Frequency Spectrum and Wavelet Packet Analyses of Blasting Vibration Signals for Different Charge Structures in Blasting Peripheral Holes

Table 2

Energy distribution percentage of blasting vibration signals with different charges (%).

Frequency band (Hz)	Charge of the peripheral hole
	Usual charge	Cutting seam charge
0～7.8125	2.229991269	1.787380786
7.8125～15.625	1.039173505	1.166917023
15.625～23.4375	3.769197911	0.295469186
23.4375～31.25	1.731948796	0.863437309
31.25～39.0625	3.810539675	0.331075298
39.0625～46.875	2.889728257	0.140676688
46.875～54.6875	3.899942775	0.725965092
54.6875～62.500	2.526712103	0.36629761
62.500～70.3125	0.96876886	0.639425781
70.3125～78.125	0.655996568	0.096318144
78.125～85.9375	1.200286895	0.20576525
85.9375～93.75	0.551350271	0.151802148
93.75～101.5625	5.299342072	0.617296493
101.5625～109.375	3.166754601	0.159958934
109.375～117.1875	1.15016411	0.158657431
117.1875～125	1.491769733	0.114527373
125～132.8125	1.184100843	0.19667787
132.8125～140.625	0.581154786	0.227530343
140.625～148.4375	0.381662	0.364889045
148.4375～156.25	0.617057835	0.135266024
156.25～164.0625	2.140549217	0.210894837
164.0625～171.875	0.750862991	0.207379654
171.875～179.6875	0.696653323	1.140918129
179.6875～187.5	0.697106629	0.097205295
187.5～195.3125	2.952418532	1.961319675
195.1875～203.125	1.294974842	0.330344305
203.125～210.9375	2.00305259	0.234988512
210.9375～218.75	1.478116589	0.187356376
218.75～226.5625	1.239580217	0.611954966
226.5625～234.375	0.770995618	1.247538037
234.375～242.1875	2.087185512	0.278642608
242.1875～250	0.917105416	0.162207238
250～257.8125	0.430405954	0.820937054
257.8125～265.625	0.166238642	0.166558523
265.625～273.4375	0.152336083	0.310912838
273.4375～281.25	0.161985449	0.23733022
281.25～289.0625	0.13309732	0.431862593
289.0625～296.875	0.141422741	0.245409739
296.875～304.6875	0.126769439	1.18991625
304.6875～312.5	0.1091704	0.166339565
312.5～320.3125	0.19894952	0.375063156
320.3125～328.125	0.275914094	0.28557955
328.125～335.9375	0.207938627	0.278342079
335.9375～351.5625	0.134050918	1.168340532
351.5625～359.375	0.368801353	1.333380002
359.375～367.1875	0.19657867	0.239051763
367.1875～375	0.335578707	0.254780878
375～382.8125	0.292799121	0.270129656
382.8125～390.625	1.364984144	1.417864314
390.625～398.4375	0.440328038	0.213662935
398.4375～406.25	0.677690601	0.291063252
406.25～414.0625	0.557850063	0.275318342
414.0625～421.875	0.672880217	0.329961157
421.875～429.6875	0.528820833	0.236063615
429.6875～437.5	0.680489098	0.31556361
437.5～445.3125	0.722819807	0.234589634
445.3125～453.125	0.375598477	0.819661957
453.125～460.9375	0.363141557	0.353280394
460.9375～468.75	0.615660307	0.212132555
468.75～476.5625	0.450106325	0.187167038
476.5625～484.375	0.429959551	0.332138932
484.375～492.1875	0.371237143	0.213792763
492.1875～500	0.232942681	0.244471176
500～4000	8.35	46.41