... Protection4. Replace Metal Mesh,Plastic gridPerformance of HockGrid® Mining Geogrid (Polyester Geogrid)Among traditional methods, room-and-pillar or bord-and-pillar ... Geogrid) Tensile strength ( warp/weft )kN/m: 30/30,40/40,50/50,60/60,80/80,100/80,120/120,200/200 ... ,ITB,TRI,China,Australia,USA,Russia Mining Safety Test. Mining Geogrid 60-60kN/m for Mineways Roof and Wall Safety Support