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
A brattice is a partition used in mining. It is built between columns of a sub-surface mine to direct air for ventilation. Depending on the type of mine and how the operation is run, brattices can be permanent (concrete block, tailings, or wood) or temporary (cloth). Temporary installations are also called curtains.