FRP mine anchor bolt is a new type of composite material made of anchor bolt, its hardness and function characteristics are as follows:
In terms of hardness, FRP anchor bolt has high strength and high carrying capacity, and its rod strength is even better than that of equal diameter rebar. Moreover, due to its special material, FRP anchor bolt also has good corrosion resistance and explosion-proof anti-static characteristics.
In terms of function, FRP anchor bolt is mainly used for support and reinforcement of underground engineering. Specifically, it can penetrate into the surrounding rock mass without occupying the roadway section, thus reducing the cost of roadway excavation. At the same time, its support stability is good, can effectively improve the stability of roadway surrounding rock, ensure the safety of construction.
In coal mining operations, its operation is relatively simple, easy to cut and does not produce sparks, reducing the labor intensity of coal miners, and will not cause damage to other mechanical equipment.
In terms of application scenario, FRP anchor bolt is mainly suitable for underground engineering such as mine, railway, tunnel, slope and so on. In these projects, it can play a role in strengthening the rock mass and supporting the roadway. In addition, due to its light weight, high strength, corrosion resistance and other advantages, FRP anchor can also be used in building structure reinforcement, bridge reinforcement, water conservancy engineering, petrochemical and other fields.
In general, FRP mine bolt plays an important role in the field of underground engineering support because of its unique performance and wide application prospect.
Although FRP anchor bolt has many advantages, such as strong corrosion resistance, light and easy to operate, high strength corrosion resistance, explosion-proof anti-static, etc., there are also some disadvantages:
Recessive support: FRP anchor bolt belongs to recessive support, and it is difficult to monitor and test the quality and reliability of support.
This may lead to the roof falling accident without obvious warning in the supporting process, which brings certain risks to the construction.
The supporting effect is not easy to guarantee: for the mining roadway with a large amount of deformation, the supporting effect of FRP anchor rod is not easy to guarantee, which may lead to the roadway being unable to use. This is because the stiffness and strength of FRP anchor rod may not fully adapt to the large deformation of roadway.
Poor impact resistance: Because FRP anchor rod is composite material, relatively brittle, poor impact resistance, easy to be damaged. This may result in frequent replacement or repair of the bolt during construction, increasing the cost and difficulty of construction.
Low shear strength: Compared with steel, the shear strength of FRP anchor bolts is low and can not withstand large shear forces. This may limit its application in certain scenarios where high shear forces are required.
To sum up, although FRP anchor has many advantages, it is also necessary to fully consider its shortcomings and restrictions when using to ensure the safety and effectiveness of construction.