Metal Pipe For Coal Mine MF33 MF40 MF43

Product Details

Hollow anchor rod is a diploma of metallic 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 strain 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 realise 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. 

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

Hollow anchor rod 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.

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.