Experiment Analysis of Drilling Feedback Signal from Simulation of Roadway Roof

Table 2

Wavelet feature-scale entropy of borehole 6.

Layer	Subband 1	Subband 2	Subband 3	Subband 4	Subband 5	Subband 6	Subband 7	Subband 8
Complete layer 1	523.82	476.51	480.32	409.53	83.60	54.15	70.73	77.17
Complete layer 2	728.95	750.62	738.07	723.25	623.58	753.29	1008.63	1115.70
Complete layer 3	918.11	510.31	770.86	608.77	485.75	309.34	421.24	804.34
Broken layer 1	115.27	217.49	171.13	94.17	98.23	93.74	103.01	118.03
Broken layer 2	97.55	134.91	88.23	104.52	108.07	68.10	34.98	113.13