ABSTRACT
The paper re-examines published creep tests data on Palo Duro salt and presents parameters of the Munson-Dawson creep law based on regression of steady state creep data. The main outcome of this statistical analysis is that the derived parameters, extrapolated to temperature and stress ranges typical of mining conditions correspond to the power law creep with the exponent 3.0 operating at differential stress below 9.5 MPa. The paper presents a review of several other published cases when the third-power stress dependence of creep was observed for rock salt and discusses possible physical mechanisms leading the third-power creep law.
