  This paper presents a model where thermo-hydro-mechanical processes are
coupled to a deformation model for preexisting fractures. The model is
formulated within a discrete-fracture-matrix framework where the rock matrix
and the fractures are considered as individual subdomains, and interaction
between them takes place on the matrix-fracture interfaces. A finite volume
discretisation implemented in the simulation toolbox PorePy is presented and
applied in a simulation showcasing the effects of the different mechanisms on
fracture deformation governed by contact mechanics, as well as their different
timescales.
