Slit Tube Anchor Bar

Product description

Slit tube anchor bar, additionally known as rock stabilizer, is an superior cloth quintessential for underground support. Pipe slit anchor is a fairly specialised help item, which is an superior fabric used for underground culvert roof and different 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% greater than that of A3 steel, which is conducive to long-term use.

Product details

Slit tube anchor bar is a diploma of steel 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 two ~ 3mm), can be at once alongside the gap to the eighty ~ 100cm vary of radial stress on the gap wall and the friction produced via the layer to stop the surrounding rock sliding down, coupled with the anchor tray tray bearing force. Thus the surrounding rock is in a three-way pressure state, to comprehend the friction anchoring pressure due to the elastic anxiety of the pipe wall squeezing the gap wall, it is a new kind of self-anchoring anchor that actively reinforces the surrounding rock of laminar development. It is a new kind of self-anchoring anchor that actively reinforces the rock with developed laminations like an enlargement nail firmly nailed to the surrounding secure rock layer. The compression pressure per 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 equal OD and material, the thicker the pipe wall, the greater the elastic stress of the steel pipe, the smaller the gap compression, and the increased the anchoring force. In the difficult rock layer its anchoring pressure is greater, such as sandstone anchoring pressure can attain 60 ~ 100kN. in the blasting vibration rock anchor shift and different occasions or with the passage of time, the later anchoring pressure has a large fashion of increasing. After one hundred days of set up in coal strata, the anchoring pressure can be multiplied from 60kN to 90kN. lateral anchoring of the strata, there is a top adaptability; borehole bending, anchoring extra firmly.

Product Parameter

Main Specifications: MF43 MF40 MF33

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

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

Working Principle

Slit tube anchor bar is a full-length anchoring, active reinforcement of the surrounding rock of the new anchor, it is a three-dimensional part of the longitudinal slit of the high-strength steel pipe, when installed in a slightly smaller than the diameter of the pipe drilling, can be immediately in the full-length range of the radial pressure on the hole wall and prevent the surrounding rock sliding friction, coupled with the anchor tray pallet bearing force, so that the surrounding rock is in a three-way state of force, and to achieve the rock great in the bursting vibration of surrounding rock Anchor shift and other circumstances, the late anchoring force has increased significantly, when the surrounding rock is significantly displaced, the anchor does not lose its support resistance, it has better characteristics 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.

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