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

Table 3

Kaiser point stress value of rock sample.

Azimuth	Sample number	Stress value (MPa)	Average value (MPa)	Remarks
Horizontal direction 225°	225°-1	7.1	9.27
	225°-2	8.8
	225°-3	11.5
	225°-4	9.7
Horizontal direction 270°	270°-1	13.5	17.25
	270°-2	14.5
	270°-3	19.4
	270°-4	21.6
Horizontal direction 315°	315°-1	4.1	18.13
	315°-2	22.8
	315°-3	—		Failure
	315°-4	27.5
Vertical direction 90°	90°-1	11.8	11.73
	90°-2	—		Failure
	90°-3	9.1
	90°-4	14.3