Anchor rods are essential support equipment in mining, tunneling, and underground construction. They work by being drilled into the rock or soil, and with the addition of anchoring agents, they provide strong support, preventing collapse and stabilizing the surrounding geological structures. Anchor rods are widely used in tunnel and mine support, as well as for underground infrastructure projects.
Anchor rod systems include several types, including Hollow Grouting Anchor Rods, Threaded Anchor Rods, Pipe Seam Anchor Rods, and Fiberglass Anchor Rods, each suited for different geological environments and support needs.
Based on different application requirements, hollow rock bolts can be categorized into:
Made of high-strength alloy steel, it offers high tensile strength and is suitable for complex geological conditions.
This type uses a disposable drill bit and drill rod, with anchoring achieved through grouting. It is particularly suitable for tunnel excavation and reinforcing soft rock layers or soil in underground mines.
By rotating or tightening the nut, the expansion shell opens, creating a mechanical lock with the borehole wall. This is combined with grouting to enhance anchoring force.
Composed of multiple rod segments connected by coupling sleeves, this design allows for deeper anchoring needs compared to single rods, while maintaining a hollow structure for grouting purposes.
| Description | unit | R25 | R32N | R32L | R32S | R32SS | R38N | R51N | T30N | T40N | T52 | T76N |
| Outer Diameter | mm | 25 | 32 | 32 | 32 | 32 | 38 | 51 | 30 | 40 | 52 | 76 |
| Inner Diameter | mm | 14.5 | 21.5 | 20 | 20 | 18.5 | 23 | 36 | 15 | 21 | 26 | 52 |
| Area | mm2 | 255 | 331 | 369 | 369 | 407 | 548 | 892 | 331 | 803 | 1274 | 1991 |
| Ultimate Tensile Load | KN | 200 | 280 | 280 | 360 | 400 | 500 | 800 | 260 | 660 | 929 | 1660 |
| Yield Load | KN | 150 | 230 | 230 | 280 | 330 | 400 | 630 | 220 | 525 | 730 | 1200 |
| Ultimate Tensile Strength | Mpa | 784 | 846 | 758 | 976 | 983 | 912 | 897 | 785 | 822 | 729 | 837 |
| Yield Strength | Mpa | 588 | 695 | 623 | 759 | 811 | 730 | 706 | 665 | 654 | 573 | 628 |
| Nominal Weight | kg/m | 2 | 2.6 | 2.85 | 2.9 | 3.2 | 4.2 | 7 | 2.6 | 6.3 | 10 | 15 |
Solid threaded rock bolts are high-strength metal anchoring products. The bolt body features continuous rolled or cut threads, which can be used in conjunction with anchoring agents or other anchoring methods. They are widely applied in mine roadways, tunnels, and slope support.
The bolt body has a solid structure, offering high strength and rigidity. The anchoring length can be freely adjusted, enhancing installation flexibility.
Solid threaded rock bolts are high-strength metal anchoring products. The bolt body features continuous rolled or cut threads, which can be used in conjunction with anchoring agents or other anchoring methods. They are widely applied in mine roadways, tunnels, and slope support.
The bolt body has a solid structure, offering high strength and rigidity. The anchoring length can be freely adjusted, enhancing installation flexibility.
Solid rock bolts are a common geotechnical reinforcement and support product, widely used in mines, tunnels, slopes, foundation pits, and other engineering projects. They are primarily used to enhance the stability of rock masses and prevent the collapse of surrounding rock or soil.
| Model | Yield strength (MPa) | Tensile strength (MPa) | Tensile strength (MPa) | Yield load (KN) | Tensile load(KN) Kg/m |
| φ16 | ≧345 | ≧510 | ≧25 | ≧69 | ≧100 1.6 |
| φ18 | ≧345 | ≧510 | ≧25 | ≧87 | ≧126 2.0 |
| φ18 | ≧345 | ≧510 | ≧25 | ≧108 | ≧156 2.5 |
| φ22 | ≧345 | ≧510 | ≧25 | ≧131 | ≧189 3.0 |
| Type | MGSL18 | MGSL20 | MGSL22 | MGSL24 | MGSL27 | ||
| Appearance | Uniform texture, no bubbles, cracks | ||||||
| Diameter(mm) | 18 | 20 | 22 | 24 | 27 | ||
| Stretch strength(MPa) | 500 | 500 | 500 | 500 | 500 | ||
| Shear strength(MPa) | 100 | 100 | 100 | 100 | 100 | ||
| Torque（Nm） | 45 | 55 | 70 | 90 | 120 | ||
| Antistatic property（Ω) | ≤3×107 | ||||||
| Flame retardant performance | Flaming | 6 pcs (s) | ≤30 | ||||
| Max single (s) | ≤15 | ||||||
| Flameless combustion | 6 pcs (s) | ≤120 | |||||
| Max single (s) | ≤60 | ||||||
| The anchoring force (KN) | 60 | 70 | 80 | 90 | 100 | ||
| Plate bearing capacity (KN) | 60 | 70 | 80 | 90 | 100 | ||
| Nut bearing capacity (KN) | 60 | 70 | 80 | 90 | 100 | ||
A mechanically anchored rockbolt is a type of anchor rod that achieves anchoring through mechanical means, such as helical extrusion, expansion tubes, or friction, to tightly adhere to the borehole wall and generate anchoring force. It is easy to install, and its support force takes effect immediately. Compared to chemical anchor bolts, mechanical rockbolts typically do not require curing time and can provide support force right after installation, making them suitable for urgent support needs.
This is a type of slotted-tube anchor rod that primarily relies on friction for anchoring. It can provide support for medium loads but is not suitable for bearing excessively heavy loads.
The expanding friction rockbolt, or Swellex, is an inflatable friction anchor rod. It is adaptable to various anchoring conditions, offering quick and simple installation. By using a high-pressure water nozzle, it provides full-length support with both friction and mechanical interlocking functions.
Mechanically anchored rockbolts are widely used in mine roadways, tunnel support, and slope reinforcement. They are suitable for rock formations of medium hardness and relatively intact structure. Some types can be used in fractured rock layers, though their support capacity may be affected by rock stability.
| Outer Diameter (mm) | Φ30 (±0.5) | Φ33 (±0.5) | Φ40 (±0.5) | Φ43 (±0.5) | |
| Length (mm) | 1200 | 1500 | 1800 | 2000 | 2500 |
| Material | Q235 | 16Mn | 20 Mnsi |
| Type | MGSL18 | MGSL20 | MGSL22 | MGSL24 | MGSL27 | ||
| Appearance | Uniform texture, no bubbles, cracks | ||||||
| Diameter(mm) | 18 | 20 | 22 | 24 | 27 | ||
| Stretch strength(MPa) | 500 | 500 | 500 | 500 | 500 | ||
| Shear strength(MPa) | 100 | 100 | 100 | 100 | 100 | ||
| Torque（Nm） | 45 | 55 | 70 | 90 | 120 | ||
| Antistatic property（Ω) | ≤3×107 | ||||||
| Flame retardant performance | Flaming | 6 pcs (s) | ≤30 | ||||
| Max single (s) | ≤15 | ||||||
| Flameless combustion | 6 pcs (s) | ≤120 | |||||
| Max single (s) | ≤60 | ||||||
| The anchoring force (KN) | 60 | 70 | 80 | 90 | 100 | ||
| Plate bearing capacity (KN) | 60 | 70 | 80 | 90 | 100 | ||
| Nut bearing capacity (KN) | 60 | 70 | 80 | 90 | 100 | ||
Improve the bond between anchor rods and the rock or soil, providing a stronger anchoring force.
| Sort by solidification time： | |||||
| Type | Features | Gel time/s | Waiting time/s | Color sign | |
| CK | Super fast | 8～40 | 10～60 | red | |
| K | Fast | 41～90 | 90～180 | blue | |
| Z | Medium speed | 91～180 | 480 | white | |
| Note: measured at (22 ± 1) °C ambient temperature | |||||
| Normal size : | |||||
| Size | 2340 | 2355 | 2360 | 2380 | 2680 |
| Diameter(mm) | Φ23±0.5 | Φ23±0.5 | Φ23±0.5 | Φ23±0.5 | Φ26±0.5 |
| Length(mm) | 400±10 | 550±10 | 600±10 | 800±10 | 800±10 |
| Note: The length of the anchoring agent could be customized . | |||||
Strengthen rock layers, preventing instability and displacement.
Provide additional lateral support, preventing movement in the geological layers.
| Mine anchor mesh is a kind of protective equipment that uses wire or steel wire to form a mesh. | |
| Material | woven from high quality low carbon steel wire. |
| Features | hooked, woven simple, beautiful and practical |
| Usage | It can be fixed or tied with bolts on the anchor to form a support form to maintain the surrounding rock between the anchors and prevent small loose rocks from falling. |
| Common widths | 180mm | 200mm | 220mm | 250mm | 280mm | 300mm |
| Common thickness | 2.5mm | 2.75mm | 3.0mm | |||
| Common hole diameter | 40mm*60mm | 30mm*70mm | ||||
| The length of the w steel belt can be customized according to the actual needs of customers. | ||||||
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