... 4.mining grid,mesh high strength fire resistant mine roof support geogrid,polyester mining grid 30-1000kN/m, ... mesh frequently on site before the longwall stops.Polyester mesh is going to be lift at the ... improve the longwall face recovery efficiency and security. polyester mesh is 3-6 m wide and 50- ... easily and reduce the self-ignition risks. Polyester Mine Grid,High Strength,Fire Retardant,Antistatic