Mining Roof Mf-47 Friction Rock Anchors

Slit Tube Anchor Overview

Slit pipe metal anchor is a diploma of metal plate rolled and pressed into a tube with longitudinal seams,it is a new sort of self-anchoring anchor that actively reinforces the surrounding rock of laminar development. It is a new form of self-anchoring anchor that actively reinforces the rock with developed laminations like an increase nail firmly nailed to the surrounding invulnerable rock layer. The compression stress per meter of the anchor into the borehole is about 25kN, and the anchoring strain generated is roughly equal to the compression force. For anchor rods of the same OD and material, the thicker the pipe wall, the higher the elastic stress of the metal pipe, the smaller the hole compression, and the multiplied the anchoring force.

Specifications and parameters

Main Specifications: MF43 MF40 MF33

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

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

Technical features

1. the uncooked fabric 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 peak of the roadway is larger than the size of the anchor rods.

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 body mounted on the anchor disk, with an impact drill anchor into the hole pipe slit anchor drilling.