Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress

Table 3

The stress of the key point in the sprayed concrete layer.

Lateral stress coefficient k0	Left sidewall midpoint		Crown midpoint		Right sidewall midpoint
	σmax	σmin	σmax	σmin	σmax	σmin
0.38	0.6	0.6	−0.7	−0.7	0.6	0.6
1.00	1.3	1.2	−8.3	−8.5	6.3	5.9
1.50	1.8	1.7	−17.0	−17.4	6.8	6.3
2.00	2.3	2.1	−26.4	−26.9	7.7	7.2
3.00	3.4	3.0	−48.2	−49.0	12.3	10.9

Note. − represents compressive stress, whereas tensile stress, unit: MPa.