Research of Rock Burst Risk Induced by Mining and Field Case in Anticlinal Control Area

Table 1

Value of “” at the peak of abutment pressure with different advancement steps.

Distance between face and anticlinal axis (m)	Maximum principal stress, σ1 (MPa)	Intermediate principal stress, σ2 (MPa)	Minimum principal stress, σ3 (MPa)
60	40.75	15.55	10.51
40	41.93	16.51	14.42
20	51.23	18.89	14.29
4	142.6	14.69	39.08
0	40.76	23.64	14.78
−2	44.00	16.30	11.68
−14	38.19	14.26	9.581
−30	32.62	12.70	8.809