Although mineral resin anchor rods are commonly used for mining support, they have their own unique advantages and disadvantages. The following is a detailed analysis of the advantages and disadvantages of resin anchor rods used in mining:
Advantages:
1.High anchoring force: The anchoring force of resin anchor rods is 3-4 times higher than other types of anchor rods (such as wood anchor rods, bamboo anchor rods, and metal anchor rods).The resin anchor rod with a diameter of 15mm has an anchoring force that can reach 50-75KN, which enhances its ability to control the surrounding rock.
2.Good cutting ability: The resin anchor rod is a composite material composed of unsaturated polyester resin as the matrix material and glass fiber as the reinforcement material, which has the characteristics of high strength but low shear resistance. This allows the shearer to directly cut the resin anchor rod, avoiding the spark problem caused by direct cutting of the shearer drum and reducing the risk of coal dust and gas explosions.
3.Lightweight: The density of resin anchor rods is generally around 2.0g/cm ³, which is only 1/4 of that of metal anchor rods. The difficulty of transporting resin anchor rods is greatly reduced by this lightweight feature.
4.Excellent corrosion resistance: Due to the resin anchor rod being made of carbon fiber reinforced resin, it can work for a long time in strong acid and alkali environments without corrosion, greatly extending the service life of the anchor rod.
5.Fast construction speed: The installation process of resin anchor rods is relatively simple, requiring only drilling, cleaning holes, grouting and other processes. The rapid speed of construction enhances work efficiency.
Disadvantages:
1.Low stiffness: Resin anchor rods are generally anchored at the end, and the deformation is evenly distributed throughout the entire rod body except for the anchoring end. Their ability to control the deformation and separation of surrounding rocks is relatively weak.
2.Difficulties in monitoring and detecting the quality and safety of anchor rod support: Resin anchor rods belong to implicit anchor rod support, and monitoring and detecting the quality and safety of anchor rod support is relatively difficult, which may lead to safety accidents of roof collapse without significant precursors.
3. It is difficult to ensure the effectiveness of anchor rod support in mining tunnels with large deformation: In some mining tunnels with large deformation, the support effectiveness of resin anchor rods may be affected, leading to the inability of the tunnels to function properly.
To sum up, resin anchor rods for mining are advantageous due to their high anchoring force, good cutting ability, light weight, excellent corrosion resistance, and fast construction speed. However, they also have disadvantages such as low stiffness, difficulty in monitoring and detecting the quality and safety of anchor rod support, and difficulty in ensuring the effectiveness of anchor rod support in large deformation recovery tunnels. In practical applications, it is necessary to choose the appropriate anchor rod type based on specific engineering conditions and requirements.
Hot Tags: mine resin bolt, China mine resin bolt manufacturers, factory, logistics of mining resin bolts, mining resin bolt specifications, advantages of mining resin bolts, quality control of mining resin bolts, resin bolts for mining, technical specifications of mining resin bolts
