Table 1 Mechanical test results of granite and similar materials with different proportions.

From: Experimental study on the mechanism of rockburst in tunnel construction by drilling and blasting construction in high ground stress stratum

Types

Compressive strength /MPa

Tensile strength /MPa

Elastic modulus /GPa

Brittleness idex

The index of rock burst proneness

granite

153.2

6.68

11.43

0.35

5.12

Ratio 0:1

40.73

2.46

7.23

0.22

1.56

Ratio 1:4

45.71

2.56

8.90

0.27

2.39

Ratio 1:3

50.45

2.72

8.99

0.18

2.11

Ratio 1:2

52.98

2.85

10.56

0.19

1.89

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