Mining Mf-43 Split Bolt

Product Details

Hollow anchor rod is a degree of metal plate rolled into a longitudinal slit with a tubular rod, with a rock drill forcibly pressed than the diameter of the rod small borehole (with a distinction of 2 ~ 3mm), can be immediately along the hollow to the 80 ~ 100cm range of radial strain on the hole wall and the friction produced via the layer to save you the encircling rock sliding down, coupled with the anchor tray tray bearing force. for that reason the encircling rock is in a 3-manner force state, to recognise the friction anchoring force due to the elastic tension of the pipe wall squeezing the hole wall, it's far a brand new kind of self-anchoring anchor that actively reinforces the encircling rock of laminar improvement. it's miles a brand new sort of self-anchoring anchor that actively reinforces the rock with evolved laminations like an expansion nail firmly nailed to the encircling strong rock layer. the compression force consistent with meter of the anchor into the borehole is about 25kn, and the anchoring pressure generated is roughly equal to the compression force. for anchor rods of the identical od and cloth, the thicker the pipe wall, the higher the elastic stress of the metallic pipe, the smaller the hollow compression, and the extra the anchoring force. within the hard rock layer its anchoring force is more, such as sandstone anchoring force can reach 60 ~ 100kn. inside the blasting vibration rock anchor shift and different instances or with the passage of time, the later anchoring force has a good sized fashion of growing. after a hundred days of installation in coal strata, the anchoring force can be multiplied from 60kn to 90kn. lateral anchoring of the strata, there is a good adaptability; borehole bending, anchoring greater firmly.

Specifications and parameters

Main Specifications: MF43 MF40 MF33

Length (mm): 1200, 1500, 1800, 2000, 2500

Material: Q235, 16Mn（Q345  Q355）, 20 Mnsi.

Working Principle of Slit Tube Anchor

Hole anchor rod is a full-duration anchoring, energetic reinforcement of the encompassing rock of the new anchor, it's miles a 3-dimensional a part of the longitudinal slit of the excessive-power metal pipe, while set up in a barely smaller than the diameter of the pipe drilling, may be immediately inside the complete-period variety of the radial pressure on the hollow wall and save you the surrounding rock sliding friction, coupled with the anchor tray pallet bearing force, in order that the surrounding rock is in a three-way kingdom of force, and to gain the rock splendid in the bursting vibration of surrounding rock anchor shift and other instances, the late anchoring pressure has increased notably, while the encircling rock is considerably displaced, the anchor does no longer lose its aid resistance, it has higher traits than the rising shell type anchor.

Technical features

1. the raw material adopts high-strength alloy strip steel;.

2. Simplest installation.

3. No anchoring agent required.

4. High friction between anchor and rock body;.

5. High shear and tensile strength; 6. Equipped with high-strength pallet, the pallet is subjected to uniform force.

6. The height of the roadway is greater than the length of the anchor rods.

Product Description

Hollow anchor rod, also called rock stabilizer, is an advanced material essential for underground support. Pipe slit anchor is a highly specialized support item, which is an advanced material used for underground culvert roof and other engineering support.

Main technical performance: Initial anchoring force: 3~7 tons; Pipe ring pull-off load: 8~10 tons; Anchor pipe pull-off resistance: 12~13 tons; Corrosion resistance is 20~30% higher than that of A3 steel, which is conducive to long-term use.

Usage

1. Determine the anchor hole position according to the design requirements, and drill the hole with drilling rig.

2. Blow out the rock powder in the hole with pressurized air.

3. The rod frame hooked up on the anchor disk, with an impact drill anchor into the hollow pipe slit anchor drilling hole diameter endorsed calculation approach: rock layer: drilling diameter = (0.9-0.95) x anchor diameter anchor drilling depth: anchor length +100mm drilling deflection rate <1% coal layer: drilling diameter = (0.9-1.00) x anchor diameter anchor drilling depth: anchor length +200mm drilling deflection rate <1.5%. drill deflection <1.5%.