Scholarly record

3D GEOMETRICAL-GEOTECHNICAL MODELING OF FRACTURED ROCK MASS USING DETERMINISTIC MODELING CASE STUDY: CHOGHART OPEN PIT MINE

M. Norouzi, S. E. Jalali, A.Y. Bafghi

Abstract

Discontinuities such as beddings, faults and joint sets usually have important role in rock slope stability analysis. Indeed, they can change a rock mass to a blocky system. First of all, in the application of different slope stability analysis methods, the blocks must be absolutely determined in geometrical shape and defined in form of polyhedron. A 3D geometrical model of jointed rock mass, including a set of simulated geotechnical blocks, can be generated considering constraints of the model boundaries and geometrical characterization of the rock mass discontinues. There are three alternatives to simulate rock mass discontinues i.e. deterministic, statistical and geostatistical methods. In this paper, the deterministic method was used for geometrical modeling. The geometrical modeling has been developed based on the Heliot algorithm. Using Mathematica software, a computer program was prepared to implement the proposed method on a real case. Based on the input data including the measured geometrical characteristic of model boundaries and discontinuities, it is possible to define the blocks locations as well as creating the mechanical and probabilistic model of rock masses, clearly. Tectonic block no.2 of the Choghart open pit mine was investigated as a case study and its geometrical model was created applying the prepared computer program.

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