Ventilatory bulkhead

VENTILATORY BULKHEAD (EN: air stopping; DE: Ventilationdamm, Wetterdamm; FR: cloison d'aerage; ES: tabique de ventilacion; RU: вентиляционная перемычка) is the device, which is purposed for the complete (or partial) termination of the movement of the air within one mine working, or for the isolation of the ventilatory streams within the adjacent mine workings.

The ventilatory bulkheads may be temporary or permanent, solid or with the ventilatory doors and windows. The temporary bulkheads are usually constructed during the emergency cases (for example, in case of the emergence of the fire) of the canvas, boards, slag wool, and glass wool. They erect the permanent ventilatory bulkheads at the distance of at least 5 metres from the place of the intersection of the mine workings within the non-cracked and sufficiently sturdy massif. Throughout the entire perimeter of the mine working, they perform the cut with the depth of at least 0.5 metres into the rock, and 1 metre into the coal; they construct the bulkheads of wood (using the logs and beams), brick, slag blocks, and concrete. For the wooden ventilatory bulkheads, they use the struts with the diameter of 10-25 centimetres, or the beams with the cross section of at least 16x16 centimetres, with the length of 0.8-1 metres. For the decreasing of the air permeability through the bulkheads, they cover the surface of these bulkheads using the hermetically sealing coatings (latex, mastic, and others). They construct the brick ventilatory bulkheads with the thickness of 1.5-3 metres. They install the concrete ventilatory bulkheads within the places, where there are required the great resistance against the rock pressure, the air-impermeability and water-impermeability.