brat·tice /ˈbrætəs, ˈbrætɪʃ/
Brat·tice n. Mining (a) A wall of separation in a shaft or gallery used for ventilation. (b) Planking to support a roof or wall.
◄ ►
brattice
n : a partition (often temporary) of planks or cloth that is
used to control ventilation in a mine
v : supply with a brattice, to ventilate mines