Dight, PM & Dyskin, AV 2007, 'Accounting for the Effect of Rock Mass Anistropy in Stress Measurements', in Y Potvin (ed.), Deep Mining 2007: Proceedings of the Fourth International Seminar on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 415-424, https://doi.org/10.36487/ACG_repo/711_30
(https://papers.acg.uwa.edu.au/p/711_30_Dight/)
Abstract: Safety and efficiency of mining operations depend on the quality of design of mining excavations and 
sequence. A crucial ingredient in mining design is the adequate information of both the original in situ stress 
and the stress disturbance caused by mining. The main method of stress determination – the overcoring – 
has a number of drawbacks. 1. It requires an open access to the location of the measurements, which is 
especially difficult if the stress is to be measured ahead of deep underground excavation. 2. It presumes the 
rock to be isotropic, while in many cases the rock anisotropy is significant. Subsequently, the isotropic stress 
reconstruction procedure of the overcoring method can give erroneous stress magnitudes and directions 
(e.g. Amadei and Goodman, 1982). The rock memory methods - DRA and the Kaiser effect are free from the 
influence of anisotropy. Moreover the DRA technique can, in principle, provide as a by-product a sufficient 
number of measurements to reconstruct the full anisotropic tensor of moduli, or compliances sufficient to 
characterise rock anisotropy, introduce corrections to the overcoring stress reconstruction procedure and 
quantify the effect of rock anisotropy on the stress concentrations induced by the excavation. In this paper, 
we present the procedure for the anisotropy characterisation based on DRA and analyse the sensitivity of the 
procedure and the effects of the rock anisotropy on stress measurements.