Experiment Analysis of Drilling Feedback Signal from Simulation of Roadway Roof

Table 1

Comparison of threshold denoising results.

Threshold rules	Energy ratio	SNR	Effective value
Sqtwolog	0.5330	3.3074	1.2452
Minimaxi	0.6625	4.7175	1.0586
Rigrsure	0.9029	10.1287	0.5678
Heursure	0.5416	3.3877	1.2337