期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
期号：NCRACE
页码：117
出版社：S&S Publications
摘要：Determination of rock mass mechanical propertiesplays vital role in design and construction of tunnels in rocks.This paper presents the estimation of rock mass parametersusing intact rock parameters. Rock mass parameters aregenerally determined from unconfined compressive strengthvalues of intact rock samples and other index parameters likegeological strength index (GSI), rock mass rating (RMR) etc.The mechanical properties of rock masses were obtainedusing a computer program Roclab based on Hoek- BrownFailure criterion which yield values of strength (compressionand tension), deformation modulus and shear strengthparameters of the rock mass. The input parameters GSI isused in conjunction with unconfined compressive strength(UCS) of the intact rock (σci) and the material constant (mi).Further, the variation of rock mass parameters with the intactrock parameters has been developed for the differentdisturbance factor varying 0-1. It has been observed that allthe parameters significantly affect the rock mass parametershence need to be considered judiciously for evolving reliabledesign rock mass parameters.
关键词：GSI; shear strength; rock mass parameters;tunnelling.
