Dry-mix shotcrete as a means of grouad support for lunnels and mining drifls is fasl, eflicient, and very safe when properly applied. lls effecliveness is unmatched: I can remember lining unstable clay mining tunnels (drifts) using a layer of shotcrete, wire mesh, and another layer of shotcrete. The arrival of steel fiber shotcrete made life even easier, taking care of severe ground conditions.