GFRP Rock Bolt Systems for Mining, Tunneling & Ground Support
GFRP rock bolt systems provide a lightweight, corrosion-resistant alternative to conventional steel ground-support anchors for mining, tunneling, slope stabilization and underground construction.
DISLAB supplies GFRP rock bolts as individual bars or as matched assemblies with compatible nuts and domed bearing plates. Diameters, bolt lengths and system configurations can be selected according to project requirements, installation conditions and specified mechanical performance.
For engineering and procurement teams, we support not only product selection but also production coordination, inspection requirements, export packing and international delivery.
Complete GFRP Rock Bolt System
A rock bolt is only one part of a ground-support assembly. For many mining and civil engineering projects, correct matching between the bolt, nut and bearing plate is equally important.
GFRP Rock Bolt
The main load-bearing element is manufactured from continuous glass-fiber reinforcement and resin through a pultrusion-based process. The threaded or profiled surface provides mechanical engagement with compatible nuts and helps develop bonding with grouting materials.
Matching Nut
Nuts are selected to match the specified bolt diameter and thread configuration. The bolt and nut should therefore be treated as a matched system rather than independently selected components.
Domed Bearing Plate
The bearing plate transfers the load from the bolt assembly to a wider area of the supported surface. Domed and reinforced plate configurations are available for ground-support applications where surface conditions may be uneven.
Bolts can also be supplied separately when the customer already has a defined plate and nut specification. For complete systems, the required component configuration should be confirmed during quotation.
Available GFRP Rock Bolt Sizes
The current product range covers nominal diameters from 18 mm to 40 mm. Standard supplier model references are shown below. Project-specific lengths can be reviewed according to production and transportation requirements.
| Supplier Model Reference | Nominal Diameter |
|---|---|
| F60-18 | 18 mm |
| F60-20 | 20 mm |
| F60-22 | 22 mm |
| F60-25 | 25 mm |
| F60-27 | 27 mm |
| F60-32 | 32 mm |
| F60-38 | 38 mm |
| F60-40 | 40 mm |
Typical Technical Performance
| Parameter | Current Product-Line Data |
|---|---|
| Diameter | 18–40 mm |
| Manufacturing Process | Pultrusion |
| Ultimate Tensile Strength | 650–700 MPa |
| Ultimate Tensile Load | 200–790 kN |
| Ultimate Shear Strength | ≥150 MPa |
| Modulus of Elasticity | ≥40 GPa |
| Torsion | 60–230 N·m |
| Processing Service | Cutting / project-specific length preparation |
Why Use GFRP Rock Bolts?
The value of GFRP in ground support comes from the combination of mechanical performance and the inherent properties of a glass-fiber composite system.
Corrosion Resistance
Unlike conventional carbon-steel anchors, GFRP does not rely on metallic corrosion protection. This makes it particularly useful where moisture, salts or other corrosive conditions are important project considerations.
Lower Weight
The lower density of fiberglass composite makes GFRP bolts substantially lighter than comparable steel products. This can simplify transportation, manual handling and installation, especially where access to the work area is restricted.
High Tensile Capacity
The available product family combines high tensile strength with different diameters and load capacities. Selection should be based on the required design load rather than diameter alone.
Non-Conductive and Non-Magnetic
GFRP is electrically non-conductive and non-magnetic, which can be useful in projects where electrical isolation or electromagnetic neutrality is required.
Continuous Surface Profile
The profiled surface provides mechanical interaction with grout and allows the rod to work as part of an anchored ground-support system. Grout type, borehole geometry and installation method should still be selected according to project design requirements.
For broader material-selection considerations, see FRP compared with steel and aluminum. Final selection should reflect the complete anchoring system and project requirements.
Typical Applications
GFRP rock bolts are used in applications where ground reinforcement must be combined with low weight, corrosion resistance or non-metallic material characteristics.
Mining
Rock bolts can be used as part of ground-support systems in underground and open-pit mining projects where reinforcement of rock or excavated surfaces is required.
Tunneling
Road, rail, utility and other underground excavation projects may use GFRP anchors for temporary or permanent reinforcement depending on the engineering design and installation requirements.
Slope Stabilization
GFRP anchors can be considered for natural or excavated slopes where reinforcement, corrosion resistance and reduced handling weight are important.
Foundation Pit and Excavation Support
Deep excavations and retaining structures can require ground anchoring systems selected around soil conditions, structural design and installation geometry.
Corrosive Infrastructure Environments
Marine, coastal, wastewater and other aggressive environments may also benefit from non-corroding composite reinforcement. Resin system and complete system suitability should be reviewed for the actual chemical and environmental exposure before specification.
Production for Project-Based Supply
For international procurement, manufacturing capability matters as much as the published product specification. GFRP rock bolt production combines continuous composite processing with accessory manufacturing, cutting, finishing and inspection.
The main GFRP rod is produced through a continuous composite manufacturing process in which glass-fiber reinforcement is combined with resin and formed into the required profile. Matching components can involve separate molding and finishing operations.
After forming, production can include cutting to specified lengths, component preparation, dimensional checks, matching of system accessories and packing preparation. This allows orders to be organized around project requirements instead of treating every bolt as a generic stock item.
For other constant-cross-section components, review our pultruded FRP profiles and provide the required profile drawing.
Quality Control and Testing
Ground-support products require more than visual inspection. Product verification should be tied to the agreed specification and the mechanical parameters important to the selected application.
Depending on the order specification, inspection can include dimensional verification and relevant mechanical or material-related testing. Available supplier test facilities include equipment for mechanical testing as well as material and environmental evaluation.
The required inspection scope should be defined before production when a project requires specific test reports, acceptance criteria or batch documentation. Not every test is automatically applied to every shipment.
Packaging and International Delivery
Long composite rods require appropriate handling during export transportation. Packing therefore needs to consider bolt length, quantity, accessory configuration and the selected shipping method.
Rock bolts can be bundled and secured according to length and shipment quantity. Nuts and bearing plates can be packed separately for easier counting and handling. Palletization, protective wrapping and container loading arrangements can be selected according to the actual order.
For long-length products, transportation feasibility should be checked before finalizing the bolt length because container size, loading method and inland transport can affect the most practical packing solution.
Engineering and Procurement Support
A successful rock-bolt order starts with correct specification review. Diameter alone is not enough to define a complete ground-support system.
DISLAB can review project requirements covering bolt diameter, required length, expected load, nut and plate configuration, quantity, packing and delivery requirements. Drawings and technical specifications are especially helpful for projects requiring a defined interface with existing ground-support hardware.
Where a complete system is required, bolts, compatible nuts and domed bearing plates should be reviewed together before production.
Information to Include in Your RFQ
To prepare a useful quotation and technical review, please provide the required bolt diameter, bolt length, quantity, application, required nut and bearing plate configuration, project destination and any available drawing or technical specification.
If the required size has not yet been finalized, send us the application conditions and target performance. We can review the available product range before quotation.
Frequently Asked Questions
What is the difference between a GFRP rock bolt and GFRP rebar?
Both products use glass-fiber reinforced polymer materials and can look similar, but their intended functions are different. GFRP rebar is primarily used as reinforcement within concrete, while GFRP rock bolts are designed as anchoring and ground-support elements for rock, soil and underground excavation systems. Rock bolts also require compatible nuts, plates and installation considerations.
Can I purchase the GFRP bolt without the nut and bearing plate?
Yes. Bolts can be supplied individually or reviewed as a complete system with matching nuts and domed bearing plates. Specify the required configuration when requesting a quotation.
What diameters are currently available?
The current range includes nominal diameters of 18, 20, 22, 25, 27, 32, 38 and 40 mm.
Can the bolt length be customized?
Cut-to-length production can be reviewed according to the required diameter, quantity, application and transportation conditions. Confirm the required finished length when requesting a quotation.
Are GFRP rock bolts suitable for corrosive environments?
GFRP offers strong resistance to many environments that cause corrosion of conventional steel. For applications involving specific chemicals, temperatures or prolonged exposure conditions, the material system should be reviewed against the actual service environment.
How do I select the correct GFRP rock bolt?
Selection should consider required design load, bolt diameter and length, ground conditions, borehole and grout system, nut and plate configuration, installation method and relevant project specifications. For engineered applications, the project designer should define or approve the final anchoring system.
Request a GFRP Rock Bolt System Quote
Send your required diameter, bolt length, quantity, application and accessory requirements. If available, include your drawing, project specification or target load requirement so we can review the appropriate GFRP rock bolt system before quotation.
Available supply: GFRP rock bolts, matching nuts, domed bearing plates and project-specific system configurations.
Request a Quote for GFRP Rock Bolt
Tell us your application, dimensions or specifications, quantity, accessory requirements and destination country. Please identify the product in your message.
For drawings or project files, use the email channel on the right.
Get a Fast QuoteGFRP Rock Bolt Systems
Request a Product Quote
Send your drawing, dimensions and quantity. Our team will review the requirements and reply with the next steps.