Issue 53

Y.D. Shou et alii, Frattura ed Integrità Strutturale, 53 (2020) 434-445; DOI: 10.3221/IGF-ESIS.53.34

experiment results prove that the model established in this paper can be well applied to evaluate the constitutive relation of coal-rock.

Parameters

Values

0 k / MPa

1139.28

0  / MPa

351.84

0.25





0.8325

0 p 

0.00479

m

p 

0.0032

1.49

C / MPa

2.5×10 -4

B



3.75

0

0.683

d Y

0.85

m



1.0

Table 1: The values of parameter involved in the proposed model

Figure 8: The theoretical and experimental results of deviatoric stress 1 3   −

versus axial strain

1  curve when the confining pressure

is 0 MPa.

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