Volcanic massifs, due to their origin, present certain characteristics that make their study through a classic geomechanical classification not always appropriate. The presence of discontinuities, the peculiar block shape and the presence of voids condition the behavior of lavatic massifs. Behavior of pyroclastic massifs depends mainly on their matrix rock, making the use of existing geomechanical classifications inadequate. This work represents a first step in the development of a geomechanical classification specific to volcanic massifs, accounting for all the properties that actually condition their behavior.

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