Research on the Deformation Law and Stress Distribution Characteristics of Overburden under the Influence of Multiple Faults
Table 2
Rock mechanics parameters.
Ground
Density (kg/m³)
Cohesion (MPa)
Friction angle (°)
Poisson’s ratio
Elastic modulus (GPa)
Compressive strength
Tensile strength (MPa)
Ratio numbera
Siltstone
2,460
3.2
30
0.23
16.1
40.2
2.4
355
Fine sandstone
2,660
2.2
32
0.25
15.9
32.8
2.0
437
Silty claystone
1,980
0.7
26
0.21
14.2
30.5
1.7
455
12coal seam
1,620
0.6
22
0.37
2.4
22.0
0.2
637
13-2coal seam
1,620
0.6
22
0.35
2.7
18.0
0.23
637
Calciferous sandy claystone
1,980
0.7
26
0.21
14.2
30.5
1.7
455
Note. aRatio number: the ratio of aggregate to binder. For example, the meaning of “637” is 6 : 1(3 : 7), which means that when making a model, the ratio of aggregate to binder is 6 : 1; in the binder, the ratio of lime to gypsum is 3 : 7.
