The Influence of Heading Rate on Roof Stability in Coal Entry Excavation

Table 3

Results of the uniaxial compressive test.

No.	Peak strength (MPa)	Average strength (MPa)	Elastic modulus (GPa)	Average modulus (GPa)	Poisson’s ratio	Average ratio
1	29.97	25.36	3.16	2.66	0.21	0.22
2	24.56		2.72		0.22
3	22.19		2.36		0.24
4	21.30		2.61		0.23
5	28.78		2.45		0.21