Cylindrical bags, 27” or 30” diameter, are secured to the mine roof and are subsequently filled with a foamed cement.
The installation of the TekCrib system is accomplished by using the Minova TekPlacer unit, specially designed to combine the TekCrib powder with air and water, producing a cementitious foam.
The foam is typically pumped a distance of 1,000 ft., although much longer distances are possible, especially when pumping down surface boreholes. The mix begins to gel within minutes of discharge and cures to a final strength, ranging from approximately 400-800 psi.
TekPak P is a patented pumpable crib material having substantial benefits in terms of roof control, speed and ease of installation. TekPak P has a high early strength allowing the crib to resist bed separation and convergence. The fully cured strength is substantial with over 150 tons of load bearing capacity.
TekSet® is a single-component, cementitious grout designed as a fill for a bag placed between the top of a crib and the mine roof, or atop a specially designed post system. Depending on the water temperature, the material will set in approximately 10 to 15 minutes. The tedious routine of blocking and wedging supplemental roof support is replaced by a simpler, faster and more efficient means.