pierraille

OBS: pierraille : désignation propre aux carrières.

CONT: ... according to the stress-strain properties and the ability to resist the gaseous DP [detonation products], the following stemming types are used: the stemming performed of the plastic materials (such as clay and sand-clay); the fine‑grained stemming (sandy, slaggy, made of the drill cuttings); the coarse‑graded (made of the break stone or the break stone and sand mixture).