- Volume 29 Issue 5
DOI QR Code
Analysis of Rock Slope Behavior Utilizing the Maximum Dip Vector of Discontinuity Plane
불연속면의 최대경사벡터를 활용한 사면거동해석
- Cho, Taechin (Department of Energy Resources Engineering, PUKYONG National University)
- 조태진 (부경대학교 에너지자원공학과)
- Received : 2019.09.24
- Accepted : 2019.10.21
- Published : 2019.10.31
Maximum dip vector of individual joint plane, which can be uniquely defined on the hemispherical projection plane, has been established by considering its dip and dip direction. A new stereographic projection method for the rock slope analysis which employs the maximum dip vector can intuitively predict the failure modes of rock slope. Since the maximum dip vector is uniquely projected on the maximum dip point of the great circle, the sliding direction of discontinuity plane can be recognized directly. By utilizing the maximum dip vector of discontinuity both the plane sliding and toppling directions of corresponding blocks can be discerned intuitively. Especially, by allocating the area of high dip maximum dip vector which can form the flanks of sliding block the potentiality for the formation of virtual sliding block has been estimated. Also, the potentiality of forming the triangular-sectioned sliding block has been determined by considering the dip angle of joint plane the dip direction of which is nearly opposite to that of the slope face. Safety factors of the different-shaped blocks of triangular section has been estimated and compared to the safety factor of the most hazardous block of rectangular section. For the wedge analysis the direction of crossline of two intersecting joint planes, which has same attribute of the maximum dip vector, is used so that wedge failures zone can be superimposed on the stereographic projection surface in which plane and toppling failure areas are already lineated. In addition the maximum dip vector zone of wedge top face has been delineated to extract the wedge top face-forming joint planes the orientation of which provides the vital information for the analysis of mechanical behavior of wedge block.
Supported by : 부경대학교
- Barth T.W. 1948. Oxygen in rocks: A basis for petrographic calculation. J. Geol., 56, 51-60.
- Barton N., Bandis S.C. and Bakhtar K. 1985. Strength, deformation and conductivity of rock joints. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts. Vol. 22, No. 3, pp. 121-140. https://doi.org/10.1016/0148-9062(85)93227-9
- Cho T. 2018. A Study for the Optimum Joint Set Orientations and Its Application to Slope Analysis. TUNNEL & UNDERGROUND SPACE Vol.28, No.4, 2018, pp.343-357. https://doi.org/10.7474/TUS.2018.28.4.343
- Cho T.F., Won K., You B. and Lee S. 2004. Application of a discontinuity orientation measurement drilling system to the characterization of an in situ rock mass and the prediction of cut-slope stability. Int J Rock Mech Min Sci (SINOROCK 2004 Symposium) Vol. 41, No. 3, pp. 503-504. https://doi.org/10.1016/j.ijrmms.2003.12.036
- Hoek E. and Brown E.T. 1980. Empirical strength criterion for rock masses. J. Geotech. Engng Div., ASCE 106(GT9). pp. 1010-1035.
- Hoek E., Bray J. and Boyd J. 1973. The stability of a rock slope containing a wedge resting on two intersecting discontinuities. Quart. J. Engng Geol., 6(1), pp. 22-35.
- Judd W. and Harber C. 1961, Correlation of rock properties by statical method. Int. Sym. Mining Res.
- Ladanyi B. and Archambault G. 1970. Simulation of shear behavior of a jointed rock mass. Proc. 11th Symp. Rock Mech., AIME, New York, 105-125.
- Mahtab M.A. and Yegulalp T.M. 1982. A rejection criterion for definition of clusters in orientation data. In Issues in Rock Mechanics, Proceedings of the 22nd Symposium on Rock Mechanics, Berkeley. R. E. Goodman and F. E. Heuze (eds), American Institute of Mining Metallurgy and Petroleum Engineers. New York. pp. 116-123.
- Priest S.D. 1985. Hemispherical Projection Methods in Rock Mechanics in Rock Mechanics George Allen and Unwin. London.
- Raax. 1997. Borehole Image Processing System Information. Sapporo, Japan.
- Read S., Richards L. and Cook G. 2003. Rock mass defect patterns and the Hoek-Brown failure criterion. Proc. 10th Cong. ISRM, South Africa. pp. 947-954.
- Shanley R.J. and Mahtab M.A. 1976. Delineation and analysis of clusters in orientation dat. Journal of Mathematical Geology Vol. 8, No. 3, pp. 9-23. https://doi.org/10.1007/BF01039681
- Sjoberg J. 2000. Failure mechanism high slopes in hard rock. Slope Stability in Surface Mining. Society of Mining, Metallurgy and Exploration. Littleton, CO. pp. 71-80.
- Wyllie D.C. and Mah C.W. 2004. Rock Slope Engineering. Civil and mining 4th edition. Spon Press.
- Yoon K.S., Cho T.F., You B.O. and Won K.S. 2003. A new approach for borehole joint investigation - Development of Discontinuity Orientation Measurement drilling system. Proc. 10th Congress of the ISRM. pp. 1355-1358.