Constant Resistance and Yielding Support Technology for Large Deformations of Surrounding Rocks in the Minxian Tunnel

Table 1

Mechanical properties of the carbonaceous slate.

	(°)	UCS (MPa)	(MPa)	(MPa)	(GPa)
Carbonaceous slate	0	35.74	3.25	4.17	6.54	0.16
	60	2.19	0.15	0.20	2.40	—
	90	36.53	1.22	2.04	29.07	0.15