Coal mine using the bi-directional welding with plastic top network 


 Coal mine using the bi-directional welding with plastic top network 
 Coal mine leave the top of the steel-plastic composite net (Steel-plastic net) mine Support Network ore with a false top network 
 It is made of polypropylene as the base material, after anti-static resistance, flame resistance treatment, to take the overall structure of the grid formed by biaxial stretching method, its performance is as follows: 
 1, the friction is not easy to generate static electricity. In underground coal mine environment, the plastic mesh surface resistance average were below 1 × 10 ⒐ Ω. 
 2, good flame retardant properties. Only melt do not burn in the open flame environment, even if the burning from the fire up to no more than 10s Jimie. 
 3, anti-corrosion, anti-aging. 
 4, to facilitate the construction and transportation. The plastic mesh is relatively soft and should not scratch the workers in the construction, but also has the advantage of easy to curl bundling, tailoring and light weight, and thus facilitate the underground transport, carry and construction. 
 To facilitate coal washing. The plastic net density of between 0.89-0.91, less than the density of water, coal washing process, the broken net with floats in the water, easy to be washed away. 
 6, the vertical and horizontal direction has a strong bearing capacity after the plastic mesh in the treatment of pressure and bit extension technology, and its molecular structure is equivalent to redirect arranged in tensile strength is not stretch 2-3 times. formation of biaxially oriented perpendicular ribs and rib, this structure makes the pressure imposed on the mesh through the node to the surrounding rib pass, thus greatly improving the overall bearing capacity of mesh, which is not easy to cause fracture of the ribs to help. This plastic mesh is biaxially oriented rather than woven mesh small amount of creep, and the mesh size is uniform, which can effectively prevent the fall of broken coal to protect the safety of underground workers and the safety of the mine car running and smooth. 
 Usage: The product is mainly used for underground coal mine seam slice mining at the top and retaining help is also available as a bolt roadway support roadways, bolting and shotcrete tunnel roadway materials. For a fake top joint use, be sure to double-layer above the other can also be used as other mine roadway engineering, slope protection works, underground civil works and traffic anchor of the road works to strengthen the material, is the best alternative to plastic braid and steel wire products. Time 
 3, steel net models and signs: 
 Steel-plastic network model by product type, material, vertical and horizontal tensile strength grade, flame retardant anti-static mesh vertical and horizontal edge class into five parts, specific signs are as follows: JD GS of PP 40MS (JD represents the false top; GS + PP that is made of steel wire + polypropylene; 40 network with a single pull-off force units of kilonewtons (KN); M indicates a complex network; S means the flame-retardant anti-static) 
 Implementation of standards: Q / ZTJ ? TG01 is-2006 coal mine with plastic top network 
 Underground coal mine with plastic top network flame retardant, antistatic properties, high tensile strength, low creep characteristics. The specifications of indicators in the following table: 
 Coal mine with fake plastic top network unit area of ??quality, size and deviation 
 Project the JD PP50,-50MS 
 Width: 4.0 m, or 5.0, can also be set according to user requirements 
 Width of the error: m 0 ~ of +0.20 
 Side length of mesh: mm 40 (± 5) × 40 (± 5) 
 Physical and mechanical properties of the coal mine with fake plastic top network 
 Item Unit JD PP50,-50MS 
 1 per meter vertical pull-off force KN / M ≥ 50 
 2 per meter of horizontal pull-off force KN / M ≥ 50 
 Three longitudinal yield elongation% ≤ 25 
 Transverse yield promoting rate% ≤ 25 
 5 stick solder joint limit peeling force N ≥ 120 
 Coal mine using the fake plastic top network retardant antistatic properties