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.

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Presentation transcript:

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

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

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

Fracture initiation in shear

Tensional fracture propagation

Mixed mode fracture propagation

Fracture propagation mainly in shear

Displacements

Maximum Displacement 11 mm

Maximum Displacement 12 mm

Maximum Displacement 13 mm

Maximum Displacement 14 mm

THANK YOU!