This study deals with the resistive zone propagation in a superconduct
ing coil during a quench, taking into account both the flux density di
stribution and the anisotropy of the thermal parameters. A Finite Diff
erence Method is used to solve the heat diffusion equation and the flu
x density is calculated by means of a semi-analytical method. The 3-D
model is suitable to describe the quench of thick coils and it call be
applied to the study of thermal stability. As an application, a 10 kJ
-solenoid is studied.