1) Divider 2) Partition 
A brattice is a partition used in mining. It is built between columns of a sub-surface mine to direct air for ventilation. Where the mine is sunk at the base of a single shaft, the shaft is divided into two parts by a wooden or metal brattice. Air is delivered down one side of the shaft and exhausted upwards through the other. Depending on the typ...
fixed tower of wood on a castle wallpartition in mine shaft used to support walls and roof
• (n.) Planking to support a roof or wall. • (n.) A wall of separation in a shaft or gallery used for ventilation.
a wooden perimeter defence
Timber tower or projecting wooden gallery; hoarding.
Timber tower or projecting wooden gallery; hoarding.
Temporary wooden gallery for use in a siege.
Brat'tice noun [ See Brettice .] (Mining) (a) A wall of separation in a shaft or gallery used for ventilation. (b) Planking to support a roof or wall. 
In mines, a brattice is a partition of light wood or canvas which divides a shaft or underground roadway in two, and furnishes a means of conducting ventilation to the working face.
[v] - supply with a brattice, to ventilate mines
noun a partition (often temporary) of planks or cloth that is used to control ventilation in a mine