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Journal of Applied Mathematics
Volume 2013 (2013), Article ID 848324, 10 pages
http://dx.doi.org/10.1155/2013/848324
Research Article

Application of D-CRDM Method in Columnar Jointed Basalts Failure Analysis

1Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China
2East China Hydropower Investigation and Design Institute, CHECC, Hangzhou 310014, China

Received 6 June 2013; Revised 3 August 2013; Accepted 20 August 2013

Academic Editor: Ga Zhang

Copyright © 2013 Changyu Jin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Columnar jointed basalt is a type of joint rock mass formed by the combined cutting effect of original joints and aphanitic microcracks. After excavation unloading, such rock mass manifested distinct mechanical properties including discontinuity, anisotropy, and proneness of cracking. On the basis of former research findings, this paper establishes a D-CRDM method applicable to the analysis of columnar jointed basalt, which not only integrates discrete element and equivalent finite-element methods, but also takes into account the coupling effect of original joints and aphanitic microcracks. From the comparative study of field monitoring data and strain softening constitutive model calculated results, it can be found that this method may well be used for the simulation of mechanical properties of columnar jointed basalts and the determination of rock failure mechanism and failure modes, thus providing references for the selection of supporting measures for this type of rock mass.