ABSTRACT
This chapter presents an example of the application of linear and nonlinear models for jointed rock mass behavior to the analysis of flatjack tests conducted in G-Tunnel at the Nevada Test Site. Modeling of rock mechanics problems requires the development of a distinctive and appropriate methodology, which may be quite different from the conventional engineering approach. The displacement gradients shown give a good indication of how rapidly the displacements decay away from the slot, which could be useful for deciding where displacement gauge anchors might be located in future tests. In assessing these results, it is important to keep in mind that the predicted displacements are expected to be considerably larger than the actual displacements. The more interesting results from this analysis apply to the use of the pressurized slot or similar loading methods to measure rock mass modulus.
