China GFRP Bolt Manufacturer for Corrosion-Resistant Mining & Underground Support
Full-thread GFRP resin anchor bolt solutions for coal mines, corrosive roadways, high-gas mines, tunnels, subway projects, and long-term permanent underground support.
Simplify your ground reinforcement with our integrated GFRP technology.
What Is GFRP Bolt: Full-Thread Glass Fiber Reinforced Polymer Resin Anchor Bolt
GFRP Bolt is a non-metallic resin anchor bolt made from glass fiber, resin matrix and additives. It is specifically designed to provide highly corrosion-resistant, lightweight, and exceptionally safe underground ground support applications.
A Non-Metallic Resin Anchor Bolt for Underground Support
As an advanced composite material, GFRP (Glass Fiber Reinforced Polymer) bolts represent a leap forward in mining technology. Unlike traditional steel bolts, they do not succumb to chemical corrosion, making them the superior choice for high-moisture or saline environments. They provide high tensile strength while maintaining a weight profile that reduces labor intensity and logistics costs.
Glass Fiber Reinforced Body
Made from high-quality continuous glass fiber and specialized resin matrix for maximum durability.
Full-Thread Surface
Continuous thread profile ensures superior bonding with resin and ease of accessory installation.
Resin Anchoring System
Creates a full-length chemical bond with surrounding rock mass for monolithic stability.
Non-Metallic Solution
Ideal for corrosive mining roadways and electromagnetic-sensitive infrastructure areas.
Explore our full range of GFRP bolt products for specialized mining support.
Problems We Solve: Overcoming Steel Bolt Failures in Harsh Mining Environments
Traditional steel bolts often fail in corrosive, high-gas, or specialized mining conditions, leading to safety risks and high maintenance costs.
Corrosion Failure
Steel bolts rust in humid/saline environments.
Structural failure & support collapse.
Acid/alkali resistant material maintains integrity.
Gas & Safety Risk
Conductive metal bolts in high-gas mines.
Stray current hazards & potential ignition.
Non-conductive, anti-static composite safety.
Difficult Cutting
Metal bolts slow down coal mining machines.
Reduced efficiency & machine spark hazard.
Easy-cut properties with zero spark emission.
High Maintenance
Frequent replacement in highly corrosive geological zones.
High lifecycle costs & operational downtime.
Long-term durability exceeds standard project timelines.
Special Support Needs
Subway/tunnels require non-magnetic support for signals.
Interference with sensitive monitoring equipment.
Non-magnetic material ensures signal transparency.
Solve your underground support challenges with high-performance GFRP solutions.
Why Choose GFRP Bolt: Enhancing Safety and Efficiency in Underground Engineering
GFRP Bolts offer superior engineering value through their unique material properties and long-term durability.
Excellent Corrosion Resistance
Resists high-concentration acid, alkali, and salt environments effortlessly.
Extends structural service life.
Never Rusts
100% non-metallic composite that prevents oxidative degradation permanently.
Reduces replacement pressure.
Lightweight & Easy to Handle
Significantly lower weight than steel equivalents for rapid deployment.
Improves installation efficiency.
Electrical Insulation
Non-conductive properties eliminate electrical hazards in sensitive areas.
Safer for gas-sensitive mines.
Non-Magnetic
Zero magnetic interference for electrical and monitoring signal transmission.
Ideal for subway and monitoring areas.
Lower Maintenance
Long-term material stability reduces the need for inspection cycles.
Reduces long-term operational costs.
Make the switch to GFRP for a safer, more efficient underground support system.
Featured GFRP Bolt Products: 6 Specialized Series for Every Underground Challenge
Our product range covers corrosive roadways, high-gas mines, full-thread anchoring, easy-cut support, permanent projects, and custom needs.
Corrosion-Resistant
For acid/alkali/humid zones
Applicable Scenarios: Chemical mining, sub-sea tunnels, and highly acidic rock formations.
Key Features: Absolute zero rust, extended operational lifespan, chemical inertia.
High-Gas Mine Safety
Anti-static & flame-retardant
Applicable Scenarios: High-methane coal mines and explosive gas environments.
Key Features: Non-conductive polymer matrix, safety-compliant certifications, spark prevention.
Full-Thread Standard
For regular resin anchoring
Applicable Scenarios: Standard mining roadways and civilian underground construction.
Key Features: Continuous thread for field cutting, high torque resistance, versatile compatibility.
Easy-Cut
For coal mining faces
Applicable Scenarios: Temporary support where TBM or shearer interaction is expected.
Key Features: Zero-spark cutting, protects machine heads, high-efficiency extraction support.
Permanent Support
For long-service infrastructure
Applicable Scenarios: Railway tunnels, permanent storage vaults, and drainage galleries.
Key Features: Low maintenance over decades, high life-cycle value, superior creep resistance.
Custom Specification
For unique diameter/length needs
Applicable Scenarios: Complex geological faults and unique engineering constraints.
Key Features: OEM support, project-based engineering, flexible manufacturing scale.
Not Sure Which GFRP Bolt Fits Your Project? Request a tailored recommendation for your requirements.
Standards & Product Positioning: Technical Compliance and Mining Safety Indicators
GFRP Bolt follows the updated MT/T 146-2025 standard system, ensuring compliance with coal mine safety and mechanical performance requirements.
published_with_changes Standard Transition
Previous Standard
MT/T 1061
Unified Standard
MT/T 146-2025
The 2025 update unifies material performance metrics, setting stricter thresholds for underground safety and reliability in complex geological zones.
≥500MPa
Tensile Strength
Requirement for high-strength tectonic support.
≥110MPa
Shear Strength
Designed for complex underground shear forces.
≤3x10⁸ Ω
Anti-Static
Surface resistance safety for coal mine gas zones.
Compliant
Flame-Retardant
Essential compliance for gas-sensitive environments.
check_circle What It IS
- check A high-load bearing structural reinforcement.
- check Advanced glass fiber polymer matrix composite.
- check A certified alternative to steel in corrosive environments.
cancel What It Is NOT
- close Not an ordinary plastic rod with low load capacity.
- close Not prone to the hydrogen embrittlement seen in steel.
- close Not a hazardous material when cut by mining machinery.
Ensure your project meets the highest safety standards with our certified GFRP bolts.
Structure & Manufacturing Process: Full-Thread Body, GFRP Nut, Plate & Pultrusion Process
A standard GFRP Bolt system includes a full-thread bolt body, matching nut, plate, and resin anchoring materials, produced through advanced pultrusion.
Bolt Body
Continuous full-thread profile for maximum bonding surface area with chemical resins.
Matching Nut
High-strength GFRP nut engineered to distribute axial load evenly across threads.
Anchor Plate
Domed or flat GFRP plates designed for optimal surface support and load transfer.
Fiber Preparation
High-modulus E-glass fibers are aligned for longitudinal strength.
Resin Impregnation
Continuous fibers are saturated in high-performance thermoset resin.
Pultrusion Forming
Heated dies cure the composite into a solid, high-density rod.
Surface Forming
Integral threads are molded directly onto the cured surface.
Discover the engineering reliability behind our structurally integrated GFRP bolt systems.
Technical Specifications: Diameter, Tensile Strength, Shear Strength & Anchorage Force
Select the right GFRP Bolt based on diameter, mechanical strength, and ultimate anchorage force to ensure project safety.
M16
16mm
Anchorage: 100kN
M18
18mm
Anchorage: 120kN
M20
20mm
Anchorage: 150kN
M22
22mm
Anchorage: 180kN
M24
24mm
Anchorage: 210kN
M27
27mm
Anchorage: 260kN
M32
32mm
Anchorage: 350kN
| Diameter (mm) | Tensile Strength (MPa) | Shear Strength (MPa) | Torsional Performance | Ultimate Anchorage Force (kN) |
|---|---|---|---|---|
| Φ16 | ≥ 500 | ≥ 110 | 40 N·m | ≥ 100 |
| Φ18 | ≥ 500 | ≥ 110 | 50 N·m | ≥ 120 |
| Φ20 | ≥ 600 | ≥ 110 | 60 N·m | ≥ 150 |
| Φ22 | ≥ 600 | ≥ 110 | 80 N·m | ≥ 180 |
| Φ24 | ≥ 650 | ≥ 110 | 100 N·m | ≥ 210 |
| Φ27 | ≥ 650 | ≥ 110 | 120 N·m | ≥ 260 |
| Φ32 | ≥ 650 | ≥ 110 | 150 N·m | ≥ 350 |
fitness_center Tensile Strength
The maximum load-carrying capacity before longitudinal fracture, essential for deep-earth support.
content_cut Shear Strength
Resistance to transversal displacement forces common in shifting rock strata.
restart_alt Torsion
Torque resistance required for the mechanical tightening of nuts during installation.
anchor Anchorage Force
The final bonding strength achieved when resin and bolt interface with the borehole.
Need help selecting the right specification?
Our engineers can provide custom load calculations for your mining roadway.
Safety Performance for Coal Mines: Anti-Static, Flame-Retardant and High-Gas Adaptability
GFRP Bolt meets key underground coal mine safety requirements such as anti-static performance, flame-retardant behavior, and non-conductive properties.
Anti-Static Performance
Surface resistance ≤ 3 x 10⁸ ohm.
VALUE
Reduces static risk in gas-sensitive zones.
Flame-Retardant Performance
Meets mine fire safety standards.
VALUE
Prevents fire propagation.
High-Gas Mine Adaptability
Non-metallic and non-conductive.
VALUE
Safer alternative for sensitive conditions.
Prioritize mine safety with our specialized anti-static and flame-retardant bolts.
GFRP Bolt vs Steel Bolt: Core Performance Comparison for Specialized Underground Support
Compared with traditional steel bolts, GFRP Bolt offers distinct advantages in corrosive, high-gas, and easy-cutting scenarios.
| Performance Metric | GFRP Bolt | Steel Bolt | Engineering Context |
|---|---|---|---|
| Corrosion Resistance | Excellent (Rust-Proof) | Poor (Requires Coating) | Acidic water or high-humidity roadways. |
| Tensile Strength | High (600-1100 MPa) | Very High (Variable) | Primary roof and wall reinforcement. |
| Weight | 1/4 of Steel | Heavy | Installation speed and manual handling safety. |
| EMI Sensitivity | Transparent (Non-Magnetic) | Interfering | Proximity to sensitive electronic instrumentation. |
| Cutting Convenience | Easy (No Sparks) | Difficult (Sparks/Damage) | Longwall mining or shearer extraction paths. |
| Long-Term Cost | Lower (No Maintenance) | Higher (Corrosion Repairs) | Life-of-mine structural integrity. |
Better for Corrosive Roadways
Inherently rust-free performance ensures zero strength loss in harsh chemical environments.
Safer for Special Coal Mines
Non-conductive and non-metallic properties eliminate electrical hazards and magnetic interference.
Easier for Cutting
Machine-friendly material allows shearers to cut through bolts without causing sparks or blade damage.
Better Long-Term Value
Lower lifecycle maintenance and replacement costs compared to failing corroded steel.
Consult our engineers to compare the benefits of GFRP for your specific project.
Field Test & Application Data: Pull-Out Test Results and Mining Site Performance
GFRP Bolt has been verified through site pull-out tests and real coal mine applications, demonstrating reliable bonding and support efficiency.
Pull-Out Performance
φ28mm bolts reaching extreme force thresholds in resin bonding, ensuring superior anchorage.
Failure Mode Analysis
Advanced observation of rod shear vs interface bonding confirms uniform stress distribution under load.
Application Efficiency
Validated data showing significantly faster installation cycles compared to traditional steel bolts.
Jineng Holding Coal Mine Application
In the highly corrosive environment of the Jineng Holding Coal Mine underground roadways, TITAN GFRP bolts provided permanent support where steel failed within 18 months. The installation showed zero degradation and maintained structural safety throughout the monitoring period.
Review our full engineering validation reports for GFRP bolt performance.
Application Scenarios: Corrosive Roadways, High-Gas Mines, and Permanent Infrastructure
GFRP Bolt is the engineered choice for environments where durability, safety, and easy-cutting are critical to operational success.
High Sulfur Coal Mine
Resistant to strong corrosive acidic environments found in sulfur-rich seams.
Saline-Alkali Roadway
High salt underground conditions that typically compromise steel integrity.
Seawater-Intruded Areas
Perfect for coastal projects requiring protection against chloride penetration.
High Gas Coal Mine
Safety-critical non-sparking support for explosion-prone mining zones.
Coal Mining Face
Easy-cutting support that allows for seamless machine advance and no-recovery.
Subway Engineering
Urban infrastructure support designed for 100-year life cycles and low maintenance.
Tunnel Engineering
Supporting complex tunnel geometries and providing permanent rock stabilization.
Permanent Support
Maintenance-free permanent infrastructure for critical long-term storage and roads.
Is your project a fit for GFRP? Get an expert application assessment.
Selection Guide & Usage Limits: Key Factors for Choosing GFRP Bolt and Critical Constraints
GFRP Bolt selection depends on project conditions, anchorage requirements, and safety standards. Understanding usage limits is essential for engineering safety.
Anchorage Force
Evaluation of tensile load requirements based on rock mass stability and expected axial stress.
Roadway Condition
Assessment of geological strata, acidity levels, and presence of corrosive groundwater.
Bolt Length
Selection of optimal length (typically 1.8m to 2.4m) to penetrate through the fracture zone.
Pre-Tension Control
Determining torque limits to ensure immediate active support without overstressing the composite material.
Critical Anchorage Depth
To achieve 100% mechanical efficiency, the anchorage section length must be strictly maintained.
Recommended Minimum Anchorage Section Length for Coal Mining Faces
GFRP bolts are not recommended for areas prone to Rockburst or High Impact Ground Stress due to the material's elastic-brittle nature compared to steel.
Consult our technical guide for optimized GFRP bolt selection.
Installation Guide: Borehole Matching, Mixing Speed, Torque and Site Cutting
Correct installation ensures the maximum performance of GFRP bolts. Follow standard procedures for borehole diameter, resin mixing, and torque.
Drilling
φ28-30mm hole diameter
Tolerance
Control depth within ±2mm
Mixing
300-500rpm for 30-45s
Tensioning
Apply max 150N·m torque
Cutting
No-spark site cutting
Borehole Size
28 - 30 mm
Precision matching ensures resin encapsulation efficiency.
Rotation Speed
400 RPM
Optimal speed for uniform resin catalyst activation.
Curing Time
30 - 60 SEC
Wait time varies based on ambient strata temperature.
Max Torque
150 N·m
Recommended limit for TITAN high-strength nuts.
Spark-Free Cutting Safety Feature
Essential for coal mine faces where methane gas is present. Unlike steel, GFRP generates no friction sparks during equipment cutting.
Ready to train your team? Download the complete installation manual.
Get Custom GFRP Bolt Solutions from China Factory
Connect directly with our China manufacturing team for specialized mining and underground support requirements. We deliver engineering-grade solutions globally.
Factory Direct Supply
Eliminate middleman costs with direct-from-source manufacturing pricing.
Custom Specifications
Bespoke diameters, lengths, and resin compatibility for unique strata.
Selection Support
Free technical consultation for engineers and project managers.