Pumpable mine ventilation structure
View Patent ↗A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.
1. A method of constructing a mine ventilation stopping wall structure in a mine shaft, comprising;
constructing in a mine shaft a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets retained in spaced relationship with cross ties and with outer perimeter edges of said spaced walls closed off therebetween with a permeable mesh having a mesh size which permits restricted flow of a cementitious grout therethrough and extending and supporting said perimeter edges to engage surrounding faces of a mine shaft;
pumping a settable fluid cementitious grout into said bag through a fill port and thereby filling said bag while exhausting entrapped air and fluid cementitious grout in said bag through said permeable mesh; and
sealing said wall at said perimeter edges to surrounding mine surfaces of the mine shaft with cementitious grout flowing through said permeable mesh.
2. The method of claim 1 including providing a man door opening in said wall structure.