Anchor rod is a bar system structure reinforced by rock and soil.
Through the longitudinal tension of the anchor rod, the shortcoming that the tensile capacity of rock and soil is much lower than the compressive capacity is overcome.
On the surface, the separation between rock and soil and the original body is limited.
Macroscopically, the cohesiveness of rock and soil is increased.
From the mechanical point of view, it is mainly to improve the cohesion c and internal friction angle φ of surrounding rock.
In essence, the anchor rod is located in the rock and soil, forming a new complex with the rock and soil. The anchor rod in the complex solves the defect of low tensile capacity of surrounding rock. Thereby greatly improving the bearing capacity of rock and soil itself.
Bolt is the most basic part of roadway support in contemporary coal mine, which bonds the surrounding rock of roadway together and makes the surrounding rock play a supporting role.
At present, anchor rods are not only used in mines, but also in engineering technology to actively strengthen slopes, tunnels and dams.
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