Source : Webster's Revised Unabridged Dictionary (1913)

Brattice \Brat"tice\, n. [See {Brettice}.] (Mining)
   (a) A wall of separation in a shaft or gallery used for
       ventilation.
   (b) Planking to support a roof or wall.

Source : WordNet®

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