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

Table 5

Uniaxial compressive strength test results.

Lithology	Number	(MPa)	()		(MPa)	()
Roof siltstone	1-1	97.23	24.45	0.15	80.28	25.63	0.25
	1-2	81.74	17.29	0.19
	1-3	74.04	24.33	0.28
	1-4	68.12	36.44	0.39
Sandy mudstone of floor	2-1	43.91	12.39	0.47	38.66	15.39	0.40
	2-2	39.37	15.86	0.39
	2-3	34.12	14.67	0.41
	2-4	37.24	18.64	0.33

Note: is compressive strength; is the modulus of elasticity; is Poisson’s ratio; is the average compressive strength; is the average modulus of elasticity; is the average Poisson’s ratio.