The self-drilling anchor bolt belongs to a kind of anchor bolt, and the role of the anchor bolt is to fix buildings, etc.. Now let's introduce what role the self- drilling anchor bolt has?

1. Self drilling anchor bolt is a member system structure for rock and soil reinforcement.

2. Overcome the disadvantage that the tensile capacity of rock and soil is far lower than the compressive capacity through the longitudinal tensile action of anchor bolt body.

3. On the surface, it restricts the separation of rock and soil mass from the matrix.

4. Macroscopically, it increases the cohesion of rock and soil mass.

5. From the mechanical point of view, it mainly improves the cohesion c and internal friction angleφof the surrounding rock mass。

6. In essence, the anchor bolt is located in the rock and soil body to form a new complex with the rock and soil body. The anchor bolt in this complex solves the disadvantage of low tensile capacity of surrounding rock mass. Thus, the bearing capacity of rock and soil itself is greatly strengthened.

7. Self drilling bolt is the basic component of roadway support in contemporary underground mining mines. It binds the surrounding rock of the roadway together and makes the surrounding rock itself.