Rock Bolt is a basic component of roadway support in contemporary underground mining. Today, rock bolts are not only used in mines, but also in engineering technology. They actively reinforce slopes, tunnels, dams, etc. Rock Bolt has a profound impact in mine business. Rock Bolt is a tensile member that penetrates deep into the ground. One end is connected to the engineering structure and the other end is deep into the ground.

The entire anchor is divided into a free section and an anchoring section. The function of the free section is to prestress the anchor rod; the function of the anchor section is to increase the bonding friction between the anchor and the soil layer, also increase the pressure-bearing effect of the anchor, and transmit the tensile force of the free section to the depth of the soil .

What are the necessary factors to make up the rock bolt?

1. A rod with higher tensile strength than rock and soil;

2. One end of the rod can be in close contact with the rock and soil to form friction (or adhesion) resistance;

3 The other end of the rod located outside the rock and soil can form radial resistance to the rock and soil.

Analysis of the role of the rock bolt:

1. Rock bolt is a member structure reinforced by rock and soil;

2. Overcoming the shortcomings that the tensile capacity of rock and soil is much lower than the compressive capacity through the longitudinal tensile force of the rod;

3. In terms of surface effects, it has restricted the detachment of rock and soil from the original body; from a macro level, it has increased the cohesion of rock and soil; from the mechanical point of view, the main reason is to improve the cohesion and internal friction angle of the surrounding rock mass;

4. In essence, the rock bolt is located in the rock and soil body and forms a new complex with the rock and soil body. The anchors in this complex are the key to solving the low tensile capacity of the surrounding rock mass, thereby greatly enhancing the bearing capacity of the rock and soil mass itself.

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