Deformation Mechanism and Control Technology of Surrounding Rock in the Deep-Buried Large-Span Chamber

Table 4

Rock tensile test results.

Number	Size		(MPa)	(MPa)
	(mm)	(mm)
2-1	48	64	4.21	4.07
2-2	48	65	4.61
2-3	48	57	3.22
2-4	48	61	4.23

Note: is the tensile strength; is the average tensile strength.