Geomechanics and Engineering

  • 제26권1호
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  • Pages.41-47
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  • 2021
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Hoek-Brown failure criterion for damage analysis of tunnels subjected to blast load

  • Chinaei, Farhad (Department of Mining Engineering, Science and Research Branch, Islamic Azad University) ;
  • Ahangari, Kaveh (Department of Mining Engineering, Science and Research Branch, Islamic Azad University) ;
  • Shirinabadi, Reza (Department of Petroleum and Mining Engineering, South Tehran Branch, Islamic Azad University)
  • 투고 : 2021.03.29
  • 심사 : 2021.06.24
  • 발행 : 2021.07.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a rock tunnel subjected to blast load is modeled mathematically. For this purpose, a cylindrical shell element is used and the motion equations are derived by energy method and Hamilton's principle. In the inner surface of tunnel, different blast holes are considered and its force in radial direction is coupled by motion equations. The structural damping of the structure is assumed by Kelvin-Voigt model. Hoek-Brown failure criterion is utilized for explosion damage analysis of the tunnel. The motion equations are solved numerically by differential quadrature method (DQM). The effect of different parameters such as depth of tunnel, number and diameter of blast holes, type of stone, geological strength index (GSI) and density of stone, type and mass of explosive material are studied on the damage factor of Hoek-Brown criterion. Numerical results show that with increasing the density of explosive material, number and diameter of blast holes, the thickness of damage is increased in the tunnel. In addition, the depth of damage is decreased with increasing strength, GSI, density of rock and depth of tunnel.

키워드

참고문헌

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