Table 1 Table of rock mechanical parameters.

From: The energy and stress evolution law of surrounding rock in gob side entry driving of adjacent mining faces

Lithology

Density /kg·m-3

Bulk /GPa

Shear /GPa

Friction /(°)

Cohesion /MPa

Tension /MPa

Sandy mudstone

2000

8.4

6.8

30

1.4

1.37

Lime stone

2600

10.94

8.9

36

4.6

6.83

Mudstone

2400

9.11

6.83

32

5.03

3.91

11#coal

1400

1.8

0.83

26

1.5

1.5

Grayish black mudstone

2300

2.03

1.04

33

3.2

3.04

Black shale

2300

2.69

1.53

33

3.4

3.24

13#coal

1400

1.8

0.83

26

1.5

1.5

Mudstone

2400

4.81

2.36

32

2.13

2.56

Lime stone

2600

10.94

8.9

36

4.6

6.83

Sandy mudstone

2000

8.4

6.8

30

1.4

1.37

Back to article page