Research on the Technology of Plugging Gushing Water in the Vertical Shaft under Complicated Conditions

Table 9

Shear strength test.

No.	Specimen size (mm)			Shear angle (°)	Failure load (kN)	Maximum normal stress (MPa)	Maximum shear stress (MPa)	Internal friction angle (°)	Cohesion (MPa)
	Length	Width	Height
1	70	70	70	55	188.6	22.1	31.5	45	10.2
2	70	70	70	60	167.9	17.1	29.7	45	10.2
3	70	70	70	65	108.4	9.35	20.1	45	10.2