Anchors are the most basic component of tunnel support in contemporary coal mines. They reinforce the surrounding rocks of the tunnels so that the surrounding rocks can support themselves. Nowadays, anchor rods are not only used in mines, but also in engineering technology to strengthen the main body of slopes, tunnels, and dams.
Several factors must be present to form an anchor
① A rod with a higher tensile strength than the rock and soil
② One end of the rod can be in close contact with the rock and soil to form friction (or bonding) resistance
③ The other end of the rod located outside the rock and soil mass can form radial resistance to the rock and soil mass
Function
The anchor rod is a rod system structure reinforced by the rock and soil mass.
Through the longitudinal tensile force of the anchor rod body, the shortcoming that the tensile capacity of the rock and soil mass is far lower than the compressive capacity is overcome.
On the surface, it seems to restrict the separation of rock and soil bodies from the original body.
From a macro perspective, it increases the cohesion of the rock and soil mass.
From a mechanical point of view, it mainly improves the cohesion and internal friction angle of the surrounding rock mass.
In fact, the anchor bolt is located in the rock and soil body and forms a new complex with the rock and soil body. The anchor rods in this complex are the key to solving the low tensile capacity of the surrounding rock mass. As a result, the bearing capacity of the rock and soil itself is greatly enhanced.
Anchor rods are the most basic component of tunnel support in contemporary underground mining mines. They bind the surrounding rock of the tunnel together so that the surrounding rock itself supports itself
Nowadays, anchor rods are not only used for Mines are also used in engineering technology for active reinforcement of slopes, tunnels, dams, etc.
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