Évaluation des contraintes en place en profondeur à partir de l'écaillage des trous de forage

The in situ stress state in a rock mass is one of the most important parameters in the design of underground openings. There are several direct methods (by restoring or recovering) that allow to measure, with a certain precision, the in situ stresses. At larger depths, most of these methods are inefficient and even impossible due to phenomena such as disking, closure and damage of the drill holes. It is therefore necessary to develop alternative methods to measure stresses considering their importance.alternatives de mesure de ces contraintes vu l'importance de leur connaissance.