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Simulation of Pillar Failure Using FRACOD 2D. Objective n To test the capability of FRACOD 2D in predicting failure of a pillar between two rock excavations.

Published byAlban Lane Modified over 9 years ago

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Presentation on theme: "Simulation of Pillar Failure Using FRACOD 2D. Objective n To test the capability of FRACOD 2D in predicting failure of a pillar between two rock excavations."— Presentation transcript:

1 Simulation of Pillar Failure Using FRACOD 2D

2 Objective n To test the capability of FRACOD 2D in predicting failure of a pillar between two rock excavations

3 Main parameters n Failure criterion: Mohr-Coulomb n Tensile strength = 9MPa n Cohesion=17MPa n Friction angle rock  =30º n K IC =1.46 MPa m 1/2 ; K IIC =6.53 K IC E=40GPa,  =0.25 E=40GPa,  =0.25 n Fracture contact properties: JKs=JKn=10e4GPa/m; friction angle=30 degrees, cohesion=0

4 Pillar width 10 m Excavation width 10 m 20 m S y =43MPa S X =18 MPa

5 Fracture initiation in shear

6 Tensional fracture propagation

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8 Mixed mode fracture propagation

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10 Fracture propagation mainly in shear

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17 Displacements

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20 Maximum Displacement 11 mm

21 Maximum Displacement 12 mm

22 Maximum Displacement 13 mm

23 Maximum Displacement 14 mm

24 THANK YOU!

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