... , and other fireproof structures.Application of HockGrid® Mine Grid (Polyester Geogrid)is applied to excavation of tunnel and mine.1. Longwall ... its conductivity and oversized mesh might cause a dangerous environment for miners to work in. Fire-retardent HockGrid® is flexible, light- ... 15m-30m) Length: 50m,100m,200m,300m,360m Certificate of HockGrid® Mine Grid (Polyester Geogrid) CE,ISO9001,ASTM,BBA ...