  One way to study the Kronecker coefficients is to focus on the Kronecker
cone, which is generated by the triples of partitions corresponding to non-zero
Kronecker coefficients. In this article we are interested in producing
particular faces of this cone, formed of stable triples (a notion defined by J.
Stembridge in 2014), using many geometric notions -- principally those of
dominant and well-covering pairs -- and results of N. Ressayre. This extends a
result obtained independently by L. Manivel and E. Vallejo in 2014 or 2015,
expressed in terms of additive matrix. To illustrate the fact that it allows to
produce quite a few new faces of the Kronecker cone, we give at the end of the
article details about what our results yield for "small dimensions".
