Study on the Mechanism and Control of Rock Burst of Coal Pillar under Complex Conditions
Table 2
Physical and mechanical parameters of the coal-rock mass.
No.
Rock type
(m)
(kg/m3)
(GPa)
(GPa)
(MPa)
(°)
1
Mudstone
2597
3.83
7.42
4.39
30.41
2
Sandy mudstone
13.0
2546
4.41
8.12
5.42
30.41
3
Mudstone
10.0
2597
3.83
7.42
4.39
30.41
4
Sandy mudstone
14.0
2546
4.41
8.12
5.42
30.41
5
Sandstone
13.0
2467
8.5
14.17
16.22
31.74
6
Sandy mudstone
8.0
2546
4.41
8.12
5.42
30.41
7
Packsand
7.0
1304
14.07
19.57
21.38
38.86
8
Mudstone
6.0
2597
3.83
7.42
4.39
30.41
9
Sandy mudstone
8.0
2546
4.41
8.12
5.42
30.41
10
Coarse sandstone
16.0
2541
10.94
13.45
21.63
29.98
11
Sandy mudstone
9.0
2546
4.41
8.12
5.42
30.41
12
Mudstone
8.0
2597
3.83
7.42
4.39
30.41
13
Coarse sandstone
5.0
2541
10.94
13.45
21.63
29.98
14
Coal seam B4-1
3.0
1304
2.88
6.25
3.81
37.49
15
Mudstone
8.0
2597
3.83
7.42
4.39
30.41
16
Coarse sandstone
14.0
2541
10.94
13.45
21.63
29.98
17
Coal seam B3
1.8
1303
1.12
2.42
4.5
30.10
18
Mudstone
3.0
2597
3.83
7.42
4.39
30.41
19
Packsand
16.0
2618
14.07
19.57
21.38
28.86
20
Coal seam B2
9.5
1640
1.91
3.91
4.9
31.26
21
Mudstone
4.0
2597
3.83
7.42
4.39
30.41
22
Packsand
2618
14.07
19.57
21.38
28.86
Note: the top and bottom thickness of the model have different thickness with the change of dip angle. is the thickness; is the unit weight, is the shear modulus; is the bulk modulus; is the cohesion; and is the internal friction.
