Table 1.
and
with different homogeneity degrees.
Fig 1.
Numerical model of heterogeneous compressive strength and homogeneous elastic modulus.
Fig 2.
Deformation and failure modes of different numerical models, the left side is the maximum principal stress cloud map, the middle is the elastic modulus cloud map, and the right side is the AE cloud map.
Fig 3.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-2-SHe.
Fig 4.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-4-SHe.
Fig 5.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-6-SHe.
Fig 6.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-8-SHe.
Fig 7.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-10-SHe.
Fig 8.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-12-SHe.
Fig 9.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-14-SHe.
Fig 10.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-16-SHe.
Fig 11.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-18-SHe.
Fig 12.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-20-SHe.
Table 2.
The dilatancy capacity, compressive strength, AE quantity and AE energy of different numerical models when the side length of the numerical model is 10 mm.
Fig 13.
Variation trend of dilatancy capacity in different numerical models.
Fig 14.
Variation trend of AE in different numerical models.
Table 3.
The dilatancy capacity, compressive strength, AE quantity and AE energy of each numerical model with the size of the heterogeneous region of compressive strength remaining unchanged (0.001*0.001 m) and the overall numerical model gradually increasing.
Fig 15.
Deformation and failure modes of different numerical models.
Fig 16.
Variation trends of AE quantity, AE energy and volume strain of numerical model 30-2-SHe.
Fig 17.
Variation trends of AE quantity, AE energy and volume strain of numerical model 40-2-SHe.
Fig 18.
Variation trends of AE quantity, AE energy and volume strain of numerical model 50-2-SHe.
Fig 19.
Variation trends of AE quantity, AE energy and volume strain of numerical model 60-2-SHe.
Table 4.
The size of the heterogeneous region of compressive strength that leads to the overall failure of the numerical model.
Fig 20.
Deformation form of numerical model.
Fig 21.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-2-EHe with a homogeneity of 1.5.
Fig 22.
Numerical models of heterogeneous compressive strength and homogeneous elastic modulus.
Table 5.
The dilatancy capacity, compressive strength, AE quantity and AE energy of the numerical model in heterogeneous regions with different elastic moduli when the side length of the numerical model is 0.01 m.
Fig 23.
Failure Modes of different numerical models.
Fig 24.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-2-EHe.
Fig 25.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-4-EHe.
Table 6.
The dilatancy capacity, compressive strength, AE quantity and AE energy of each numerical model with the size of the elastic modulus heterogeneous region remaining unchanged (0.001*0.001 m) and the numerical model gradually increasing as a whole.
Fig 26.
Failure Modes of different numerical models.
Fig 27.
Variation trends of AE quantity, AE energy and volume strain of numerical model 30-2-EHe.
Fig 28.
Variation trends of AE quantity, AE energy and volume strain of numerical model 40-2-EHe.
Fig 29.
Variation trends of AE quantity and AE energy in different numerical models.
Fig 30.
Failure Modes of different numerical models.
Fig 31.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-2-EHe with a homogeneity of 1.5.
Fig 32.
Variation trends of AE quantity, AE energy and volume strain of numerical model 20-2-SHe with a homogeneity of 1.5.
Fig 33.
Failure mode of the numerical model.
Fig 34.
Variation trends of AE quantity, AE energy and volume strain of the numerical model 20-2-EHe when the elastic modulus is expanded by 1.7 times.
Fig 35.
Variation trends of AE quantity, AE energy and volume strain of the numerical model 20-2-EHe when the elastic modulus is expanded by 1.8 times.
Fig 36.
Variation trends of AE quantity, AE energy and volume strain of the numerical model 20-2-SHe when its compressive strength is expanded by 10 times.