The effect of confining stress directionality on the TBM disc penetration using PFC2D

Document Type : Original Article

Authors

1 Academic Member, Mining Engineering Department, Hamedan University of Technology, Hamedan, Iran.

2 MSc Student in Mining Engineering, Hamedan University of Technology, Hamedan, Iran.

Abstract

In this paper, the effect of confining pressure directionality on the rock fragmentation has been investigated using PFC2D. For this purpose five different directionality  was used, i.e. 0°, 30°, 45°,60° and 90°. Tensile strength of all models is 2.1 MPa. These models are under confining pressure of 5%, 10% and 15% of crack initiation stress. Totally 15 model were simulated. Disc cutters are U shape and its spacing was fixed (1a: a, is cutter width). The result shows that the optimum directionality for confining pressure is when its angularity is 0°.

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References

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Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 10, Number 1 & 2
September 2017
Pages 75-84

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History

  • Receive Date: 26 June 2017
  • Revise Date: 20 March 2018
  • Accept Date: 22 September 2018

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