Study on Creep Characteristics and Constitutive Relation of Fractured Rock Mass
Table 2
Triaxial unloading creep test data of prefabricated cracked coal samples.
Number
σ1 (MPa)
σ2 (MPa)
εi1 (%)
εi3 (%)
(%)
εc1 (%)
εc3 (%)
(%)
A00
45
10
1.682
0.615
0.452
0.080
0.011
0.058
8
3.444
1.248
0.948
0.085
0.016
0.054
6
5.211
1.900
1.411
0.089
0.027
0.035
4
6.982
2.605
1.773
0.095
0.032
0.031
2
8.759
3.363
2.032
—
—
—
A30
40
10
1.793
0.644
0.506
0.102
0.020
0.062
8
3.690
1.361
0.968
0.111
0.022
0.067
6
5.595
2.151
1.293
0.121
0.029
0.064
4
7.510
3.043
1.424
0.137
0.034
0.069
2
9.469
4.034
1.401
—
—
—
A45
35
10
1.970
0.699
0.572
0.119
0.019
0.081
8
4.129
1.466
1.198
0.131
0.038
0.055
6
6.299
2.292
1.716
0.142
0.083
−0.023
4
8.487
3.204
2.079
—
—
—
A60
33
10
2.084
0.757
0.570
0.188
0.012
0.164
8
4.286
1.534
1.217
0.196
0.061
0.073
6
6.501
2.380
1.741
0.209
0.096
0.016
4
8.751
3.309
2.134
—
—
—
σ1 and σ3 are the axial pressure and confining pressure; εi1, εi3, and are the axial, lateral, and volumetric instantaneous strain increments, respectively; εc1, εc3, and are the axial, lateral, and volumetric creep strain increments, respectively.
