Browse > Article

Tunnel Stability Assessment Considering Rock Damage from Blasting Near to Excavation Line  

이인모 (고려대학교 공과대학 토목환경공학과)
윤현진 (㈜바우컨설턴트 기술연구소)
이형주 (삼성건설 토목영업팀)
이상돈 (한국도로공사 도로교통기술원)
박봉기 (고려대학교 공과대학 토목환경공학과)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.4, 2003 , pp. 167-178 More about this Journal
Abstract
Damage and overbreak of the remaining rock induced by blasting can not be avoided during tunnel construction which may result in either short-term or long-term tunnel instability. Therefore, in this paper, a methodology to take into account the effect of blast-induced damage in tunnel stability assessment is proposed. Dynamic numerical analysis was executed to evaluate damage and overbreak of the remaining rock for the most common blasting pattern in road tunnel. Rock damage was quantified by utilizing the damage variable factor which is adopted proposed in continuum damage mechanics. The damaged rock stiffness and the damaged failure criteria are used to consider the effect of rock damage in tunnel stability analysis. The damaged geological strength index of the damaged rock was newly proposed from the relationship between deformation modulus and geological strength index. Also the Hoek-Brown failure criteria of the damaged rock was obtained using the damaged geological strength index. Analysing the tunnel stability with the consideration of the blast-induced damage of remaining rock, it was found that the extend of plastic zone and deformation increased compared to the undamaged rock. Therefore the short-term or long-term tunnel stability will be threatened when the rock damage from blasting is ignored in the tunnel stability analysis.
Keywords
Blast; Continuum damage model; Hoek-Brown failure criteria; Rock damage; Tunnel stability;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Modeling of Wave Propagagtion Induced by Underground Explosion /
[ MA,G.W.;Hao,H,;Zhou,Y.X. ] / Computer and Geotechnics   ScienceOn
2 /
[ 윤지선 ] / 최신 발파기술
3 /
[ Hoek,E.;Carranza-Torres,C.;Corkum,B. ] / Hoek-Brown Failure Criterion(2002 Edition)
4 Applicability of Mohr-Coulomb and Hoek-Brown Strength Criteria to the Dynamic Strength of Brittle Rock /
[ Zhao,J. ] / International J. Rock Mechanics and Mining Sciences
5 Experimental Approaches on Estimation of Damage Zone due to Blast Loading /
[ Kweon,J.W. ] / MS. Thesis, Korea University
6 Fragmentation of Rock under Dynamic Loads /
[ Shockey,D.A.;Curran,D.R.;Seaman,L.;Rosenberg,J.T.;Petersen,C.F. ] / Int. J. Rock Mech. Min. Sci. & Geomech. Abstr.   ScienceOn
7 Continuum Modelling of Explosive Fracture in Oil Shale /
[ Grady,D.E.;Kipp,M.E. ] / Int J. Rock Mech. Min. Sci. & Geomech. Abstr   ScienceOn
8 A New Constitutive Model for Blast Damage /
[ Yang,R.;Bawden,W.F.;Katsabanis,P.D. ] / Int. J. Rock Mech. Min. Sci. & Geomech. Abstr.   ScienceOn
9 Advances in Computational Mechanics Applied to Wave Propagation Problem /
[ Valliappan,S.;Wang,Y.C. ] / Computer Methods and Advances in Gemechanics
10 Blast Damage Study by Measurement and Numerical Modeling of Blast Damage and Vibration in the Area adjacent to Blast Hole /
[ Bawden,W.F.;Katsabanis,P.;Yang,R. ] / Innovative Mine Design for the 21st Century Proceeding of the International Congress on Mine Design
11 Experimental and Computational Investigation of the Fundamental Mechanics of Cratering /
[ Throne,B.J.;Hommert,P.J.;Brown,B. ] / 3rd International Symposium on Rock Fragmentation by Blasting
12 Consideration of the Geomechanical Classification of Bieniawski /
[ Serafim,J.L.;Pereira,J.P. ] / Proc. Int. Symp. on Engineering Geology and Underground Construction, Lisbon
13 /
[ Hibbitt, Karlsson & Sorensen ] / ABAQUS/Explicit (version 6.2) User`s Manual
14 Quantitative Assessment of Blast Waves and Numerical Approach for Tunnel Blasting Optimization /
[ Kim,S.G. ] / Ph.D. Thesis, Korea University
15 /
[ Whittaker,B.N.;Singh,R.N.;Sun,G. ] / Rock Fracture Mechanics
16 /
[ Marsh,S.R. ] / Last Shock Hugoniot Data
17 Development of a Continuum Damage Model for Blasting Analysis /
[ Liu,L.;Katsabanis,P.D. ] / Int. J. Rock Mech. Min. Sci.   ScienceOn