Since the bolt assembly into the hollow structure 
 Alloy drill: from high-quality alloy made by precision engineering, with strong hardness and toughness, penetrating power can go into many types of rock bolt 
 Anchor body: assembly of the most important components in the drilling and anchoring plays a major role. 
 Connection sets: when the bolt connecting role to be extended. 
 Plate: the rock can withstand greater stress. 
 Nuts: can rock on the stress concentration to the plate. 

 Since the hollow bolt into the main technical performance parameters: 
 Model ZJS25 ZJS27 ZJS28 ZJS32 ZJS38 ZJS51 
 Diameter (mm) ￠ 25 ￠ 27 ￠ 28 ￠ 32 ￠ 38 ￠ 51 
 Tensile strength (MPa) ≥ 650 ≥ 650 ≥ 650 ≥ 650 ≥ 650 ≥ 650 
 Tooth height (mm) 1.5 ± 0.1 
 Pitch (mm) 12.7 ± 0.1 
 Thread direction L 
 Standard Length (m) 2.0 3.0 3.5 4.0 4.5 5 6 (according to your requirements) 
 Length error of ± 1% 
 Maximum drilling depth of 12 meters 
 Note tensile strength and length can be produced according to customer design requirements 
 Since the construction process into the hollow anchor 
 1, the alloy drill and bolt one end to connect the other end connected to the drill sets, drill after the end of trolley or hand-held and rig connected. Start by designing the depth of drilling, drilling to be filling the cooling water. (Anchor for longer, can be used to connect sets to connect, and then drilling) 
 2, remove the rig, only the pulp plug will be set into the rod, and inserted into the hole, ready to grouting. Special circumstances into the grouting pressure is too large or too broken rock, can anchor the sealing agent. 
 3, the quick end of grouting joints and bolt connections, grouting and grouting joints connect the other end. 
 4, start grouting grouting grouting to be full and the pressure to shut down when it reaches its design value. Grouting pressure grouting machine according to the design parameters and performance determined 
 Fui Sha than the reference value of 1:0 ~ 1:1, water-cement ratio reference value of 0.45 ~ 0.5:1. 
 5, the installation plate and nut, and tighten the nut. 

 Professional production bolt, drill pipe, B19 drill, B22 drill, air drill, coal drill (twist drill rod), imitation of the British drill pipe, drill pipe to help anchor, hexagonal drill pipe, L-bolt, right rotating bolt, hollow bolt, hollow grouting anchor, self-feeding hollow bolt, self-drilling hollow bolt, and coal seam tube bolt and so on. 
 Drill: B19 drill, B19 anchor, B22 drill pipe, B22 air drill, drill to help anchor, coal drill, twist drill rod, hexagonal drill pipe, drill imitation of the British, bolt, drill pipe, left rotating bolt, right-handed bolt, glass, steel bolts, etc., hollow grouting anchor, self-feeding hollow grouting anchor, self-feeding drill pipe, self-drilling drill pipe, glass, steel bolt, slotted bolt tube other strong thread such as resin bolt 
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