A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

Table 1

Sample information of the acoustic emission test.

Azimuth	Sample number	Sample size		Axial velocity value (m·s^−1)
		Height (mm)	Diameter (mm)
Horizontal direction 225°	225°-1	102.56	54.00	4102
	225°-2	102.60	55.28	4104
	225°-3	102.40	55.00	4096
	225°-4	101.10	55.04	4044
Horizontal direction 270°	270°-1	101.70	53.44	3767
	270°-2	103.00	53.74	3433
	270°-3	101.48	53.50	3383
	270°-4	102.06	53.40	3645
Horizontal direction 315°	315°-1	102.76	54.02	3806
	315°-2	102.40	53.74	3657
	315°-3	102.02	54.00	4251
	315°-4	103.30	54.02	3973
Vertical direction 90°	90°-1	99.96	49.04	3832
	90°-2	100.02	48.98	3804
	90°-3	100.00	49.00	4167
	90°-4	100.50	49.00	4188