china coal 0001
Arc Plate Net Shell Support
Keywords: Net Shell Support, Stainless Steel Support, Steel Supports Price
Introduction of Arc Plate Net Shell Support
Supporting of soft rock tunnel excavation has been one of the key technical problems which affects the further development of coal industry production and construction of our country . Deep mine ground pressure intensity is high, under the condition of mining influence and impact ground pressure and strata control is especially difficult, thus support system is more and more strengthened, such as the need to reduce the frame from u-shape set, strengthen the link rod, and even to use U36 steel;spray the anchor net supporting to reinforced by steel arch, or and anchor rope combined support, surrounding rock grouting, etc; Although this can achieve certain supporting effect, but support cost is very high. Therefore, China coal group design to create a new type of flat net shell components, the main supporting characteristics of arc plate net shell components summed up as: "while digging, while supported edge, "before soft to hard", enough stiffness, process simple,low price."
Characteristics of Arc Plate Net Shell Support
1,"While digging, while supported edge",timely support
Arc Plate Net Shell Support can use waste rock filling, grey package after wall, concrete precast slab, such as filling, network frame and the tunnel contour quickly close to stick, while digging, timely support, so that on the one hand can make the support resistance of support was able to play in time, to timely reinforce the surrounding rock and to work under the stress state in three; On the other hand, have the effect of slow pressure, pressure, lead to the uniform support along the perimeter stress, is in good working condition.
2,Arc Plate Net Shell Support has enough "rigidity"
3,"Just moderately soft, before soft to hard".
Arc Plate Net Shell Support force has a complex ingredients: expansion and creep of rock mass, reduce the strength of long, crushing of rock mass adhesion coefficient reduced values, etc., all show the macroscopic displacement of rock mass and any rigid support to prevent displacement will be entirely itself in disadvantage. Therefore, the stability of the laneway to end support, work together to complete of the surrounding rock. Reticulated shell scaffold, while under high in-situ stress reaction in surrounding rock, making convergence of surrounding rock in supporting under the control of convergence, by stent supported edge, the edge of broken rock mass convergence pressure unceasingly, forming a stable bearing ring, together with stents to assume the role of in-situ stress.
The scalability of Arc Plate Net Shell Support comes from two aspects:
(1) the contact of the spatial grid steel supports and surrounding rock itself has certain yielding;
(2) the junctions between the reticulated shell scaffold piece and piece of wood plate.
Material: high carbon spring steel, spring steel, stainless steel, alloy steel Compression Spring, Extension Spring : Wire Diameter: 0.2-40.0mm Torsion spring wire diameter :0.2-35mm Surface Finish: black , Zinc, Nickel, silver, golden, tin, powder coating, shot pin Applications: Automotive, medical device, agricultural machinery ,electronics, toy, electric power distribution. Extension spring hook include Germany hook, British hook, Side hook We can customize special design of springs based on your requirement.
Can supply: ALUMINIUM LAMINATED FILM ROLLS, PRINTED STOCK LOT. Post industrial. Clean. Pack: in big bags. Can load in 1x40HC container aprox. 26 - 28 MT net. Ready for shipment. Photos available upon request. If you are interested kindly contact us for more information. You are welcome to visit our company premises and supervise our materials. Certificate ISO: 9001, ISO: 14001, OHSAS 45001, AQSIQ and CCIC
We are glad to propose 500 MT of stain less steel mill scale. Mill scale is formed on the outer surfaces during by the hot rolling lamination of stainless-steel products. At a visual inspection the material is a hard brittle sand and is mainly composed of iron oxides, mostly ferric, and is bluish black in colour, but it also contains considerable alloying elements such as chromium and nickel. The recovery ratio after melting in furnace for the most valuable alloy elements is: - Ni: 3.5 - 4.5% - Cr: 6-8% From the chemical and physical analysis performed on the scrap, and according to the European environmental rules, the material has been classified as a special non dangerous waste, listed in green list. In particular the mill scale can be classified as follows: Waste code: 10 02 10 The material is stored on cemented flooring, and it can be loaded loose in tipper trucks or containers. Chemical analysis of the material is available on request.
Supplier: Hot rolled steel sheet,430 stainless steel coil,301 stainless steel,304 stainless steel strip,steel strip,steel banding,steel coils,stainless steel,steel pipe,steel tube, seamless steel pipe, welded steel pipe/tube,stainless steel pipe,glavanized steel wire,galvanized steel coil,galvanized steel sheet,roofing sheet,corrugated steel sheet,gas spring tubes,precision steel tube and fabricating metals,rolling springs,shutter springs,shutt door components,spring box,bia stable steel spring coil,65mn/c75 /sk5 steel strip
Supplier: Ethanol /alcohol process line/machine,ethanol/alcohol turnkey project , industry fruit process machine/production line ,industry vegetable process machine/production line, industry noodle machine/production line , industry bread/cake machine/process line and so on . industry waste water treatment system process line .packing machine
Services: Our company's products, technical support, training, installation and commissioning
Product Name Citric acid monohydrate Product Charactersï White Crystalline Powders, Colorless Crystals or Granules Executive Standards BP/USP/FCC/E330/GB1886.235-2016 Packaging plastic woven bag, 25kg net composite paper-plastic bags or 3-ply kraft paper bags with PE liner, 500kg or 1000kg net PP woven Jumbo bags Storage Kept in a light-proof, well-closed, dry and cool place Main Usage Citric Acid is mainly used as acidulant, flavoring agent, preservative and antistaling agent in food and beverage industry.it is also used as antioxidant, plasticizer and detergent in chemical, cosmetics and cleaning industries.
Commodity:Sodium sulfite Molecular Formula: Na2SO3 Molecule Weight: 126.04 Appearance: white or light yellow crystalline powder Item Value Top-grade First grade Qualified product sodium sulfite (Na2SO3),% 98.0, 96.0, 93.0 Fe,% 0.003 0.005 0.02 water-Insoluble ,% water-Insoluble ,% 0.02, 0.03, 0.05 Free alkali(as Na2SO3),% 0.10, 0.40, 0.80 Sulfate(as Na2SO4),% 2.5 Chloride(as NaCl),% 0.10 Uses: used in leather and tannage, plant bleaching agent, reductant Packing: in polythene plastic bag with a polypropylene overbag, paper-plastic composite bag, kraft bag, etc. Net weight: 25,50,1000kilograms per bag or following your demand.
Commodity: Calcium carbide Molecular formula:CaC2 Molecule Weight: 64.10 H.S code:28491000 CAS: 75-20-7 UN NO.1402 HAZARD CLASS: 4.3 Application: It is a kind of basic material for organic synthesis, and can produce acetylene gas for cutting and welding, also be material for calcium cyanamide. Appearance: Grey, black solid, purple when its purity is more than 90%. Granule:4-25mm / 15-25mm / 25-50mm / 50-80mm /25-80/ 80-120mm Package: Net in 100kg or 50kg new iron drums with nitrogen. Specification: GB10665-2004 Specification Superfine Grade First Grade Second Grade Gas yield(L/kg)L/kg 305 295-305 285-295 PH3 content in acetylene (PH3%) 0.06 0.08 0.08 H2S content in acetylene (H2S%) 0.1 0.1 0.1 Loading weight in 1 x 20fcl:22.5mt
Commodity: Sodium Bisulfite Molecular Formula: NaHSO3 Molecular Weight: 104.06 Properties: White monoclinic crystalline powder with sulfur dioxide odor; relative density: 1.49; very easily soluble in water; can be decomposed when heated; slightly soluble in ethanol; aqueous solution is acidic; has strong reducing property; can be oxidized in the air or loose sulfur dioxide. Quality Standard: HG/T3492-80 Technical Indicator High-purity grade Acrylic grade Food grade Refined grade Industrial grade 1 NaHSO3 % 99.5 Insol. in water % 0.003, 0.005, 0.03, 0.04, 0.05 Chloride(Cl) % 0.003, 0.004 Iron(Fe) % 0.001 0.002 0.005 Heavy metal(Pb) 0.001 Arsenic(As) % 0.0001 Clarity test Qualified Use: It is used in the bleaching of cotton textiles; as reducing agent in dyes, paper-making, leather, chemical synthesis; in the manufacture of pharmaceutical intermediates, developer, food bleacher, antiseptic and anti-oxidants. Packing: In PP woven bag lined with PE bag; paper-plastic composite bag, and kraft paper bag etc. Net wt.: 25/50/1000 kgs/bag or upon clients' request.
