Usually the tubbings resisted the enormous pressure; the only thing to be dreaded was the piling up of the neighbouring soil, shaken by the constant movement of the old galleries which were filling up.
D'ordinaire, les cuvelages tenaient bon, sous la pression énorme. Ils ne redoutaient guere que le tassement des terrains voisins, ébranlés par le travail continu des anciennes galeries d'exploitation, qui se comblaient.