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

Table 4

Relationship between the average principal stress and the vertical principal stress in different countries in the world [23].

Country name
	<0.8	0.8~1.2	>1.2
China	32	40	28	2.09
Australia	0	22	78	2.95
Canada	0	0	100	2.56
America	18	41	41	3.29
Norway	17	17	66	3.56
Sweden	0	0	100	4.99
South Africa	41	24	35	2.50
Former Soviet Union	51	29	20	4.30
Other areas	37.5	37.5	25	1.96