Concrete Cloth Vent Wall/Stopping MarblaegisGypsum Mine England

Why Vent WallsIncoming clean air is kept separately from dirty dust filled air being pumped out by placing divides between the supporting pilars.

Competition – Brattice ClothLooks like a tarp and is hung up using eyelets fixed to the rock. Very quick but a temporary measure.

Competition – Gypsum/Plaster BoardThis mine produced gypsum board so the material cost was minimal, however they do rot and may only last 2-3 months.

Competition – Concrete Block Walls (Stock Photo)Durable, expensive, slow to build and may require specialist contractors.

FrameFrame created using British Gypsum branded aluminium stud wall system (“Channel”) for the horizontal and timber for the vertical. Timber can be used but the channel system was readily available. You can screw into both materials using standard fixings.

The vertical timbers were placed at 950mm centres to allow for 50mm overlap of the 1000mm wide CC5.

Concrete Cloth is cut to the required length using a knife.

The cloth was held in place and screwed to the frames. We first secured it with two screws to allow us to fine tune the positioning and then finally secure around the perimeter of the cloth.

A batten fixed the CC to the wall using hammer screw anchors. A batten was also used to secure the CC at the top. In this case we didn't hydrate underneath the battens or overlaps as the joints were not too tight and would not let the water in.

Fixing to the top frame prior to the batten being added

Final fixing of the first panel

The mine used steels which were about 200mm long and were very quick and provided a strong fixing when used with standard screws. These steels formed part of the British Gypsum stud wall system.

The top edge secured with steels and then a wooden batten

This photograph shows the CC panel secured with a screw whilst the position of the panel is being adjusted.

The second CC panel was added with a 50mm overlap to the first panel along the vertical edge. In this case it was not deemed necessary to fix the bottom and it left to set in place.

Vertical Overlap Joint

Subsequent Panels fixed

CC hydrated in accordance with CC hydration guide

Benefits of a CC Vent Wall

• Similar erection speed to temporary vent walls (e.g. Gypsum boards)

• More durable than temporary vent walls• No specialised labour required – Concrete

block walls require contractors• Cheaper than concrete block walls.