Characteristics and Time-Space Evolution of Mining Stress in High Stope

Table 1

Three-dimensional peak stress during the mining process.

Horizontal section (m)	Mining time (D)	Three-dimensional peak stress (MPa)			Side pressure coefficient
		−325	38	11.(15.80)	5.04 (5.92)	9.58(10.56)	0.45	0.85
−350	43	15.(18.86)	5.21 (6.04)	6.96(8.52)	0.34	0.45
−375	71	15.(20.73)	6.08 (7.59)	10.15(12.03)	0.39	0.65
−400	129	23.7 (19.8)	11.85 (11.22)	15.03(13.33)	0.50	0.63

Note: the values in brackets are the stress jump under the influence of blasting.