... Protection4. Replace Metal Mesh,Plastic gridPerformance of HockGrid® Mining Geogrid (Polyester Geogrid)Among traditional methods, room-and-pillar or bord-and- ... HockGrid® Mining Geogrid (Polyester Geogrid) Tensile strength ( warp/weft )kN/m: 30/30,40/40,50/50,60/60,80/80,100/80,120/120 ... Geogrid) CE,ISO9001,ASTM,BBA,TBU,ITB,TRI,China,Australia,USA,Russia Mining Safety Test. Mining Grid 80-80kN/m for ...