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Simulation of Pillar Failure Using FRACOD 2D

Simulation of Pillar Failure Using FRACOD 2D. Objective To test the capability of FRACOD 2D in predicting failure of a pillar between two rock excavations. Main parameters Failure criterion: Mohr-Coulomb Tensile strength = 9MPa Cohesion=17MPa Friction angle rock  =30º

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Simulation of Pillar Failure Using FRACOD 2D

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  1. Simulation of Pillar Failure Using FRACOD2D

  2. Objective • To test the capability of FRACOD2D in predicting failure of a pillar between two rock excavations

  3. Main parameters • Failure criterion: Mohr-Coulomb • Tensile strength = 9MPa • Cohesion=17MPa • Friction angle rock =30º • KIC=1.46 MPa m1/2; KIIC=6.53 KIC • E=40GPa, u=0.25 • Fracture contact properties: JKs=JKn=10e4GPa/m; friction angle=30 degrees, cohesion=0

  4. Sy=43MPa SX=18 MPa Pillar width 10 m Excavation width 10 m Excavation width 10 m 20 m

  5. Fracture initiation inshear

  6. Tensional fracture propagation

  7. Tensional fracture propagation

  8. Mixed mode fracture propagation

  9. Mixed mode fracture propagation

  10. Fracture propagation mainly in shear

  11. Fracture propagation mainly in shear

  12. Fracture propagation mainly in shear

  13. Fracture propagation mainly in shear

  14. Fracture propagation mainly in shear

  15. Fracture propagation mainly in shear

  16. Fracture propagation mainly in shear

  17. Displacements

  18. Maximum Displacement 11 mm

  19. Maximum Displacement 12 mm

  20. Maximum Displacement 13 mm

  21. Maximum Displacement 14 mm

  22. THANK YOU!

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