Vibration Signal Analysis of Water Seal Blasting Based on Wavelet Threshold Denoising and HHT Transformation

Table 2

Main blasting parameters of the upper bench.

Blast-hole type	Blast-hole diameter (mm)	Detonator section	Delay time (ms)	Blast-hole depth (m)	Single hole charge (kg)
Cutting hole	42	1	<13	3.5	2.7
		3	50 ± 10
Auxiliary hole	42	5	110 ± 15	3.3	1.8
		7	200 ± 20
		9	310 ± 20
		11	460 ± 20
Peripheral hole	42	11	460 ± 20	3.3	1.2
		13	650 ± 25
		15	880 ± 60