What Is a Hollow Grouting Cable Bolt?
High-Bearing Cable Support with Integrated Grouting Channel
A hollow grouting cable bolt is a high-capacity support product that integrates a prestressed cable body with an internal grouting channel. The cable body works as both the main load-bearing element and the grout delivery channel, allowing cement-based grout to be injected into the borehole and surrounding rock fractures without an additional grouting pipe.
High-Bearing Cable Body
The hollow cable body provides high tensile capacity and supports the surrounding rock through prestressed cable action.
Integrated Grouting Channel
The internal hollow channel allows grout to be injected directly through the cable body without an additional grouting pipe.
Cable + Grout Synergy
Cable bearing and grouting reinforcement work together to improve anchorage force, rock mass integrity, and support reliability.
Ready to enhance your underground mining and tunneling projects?
Explore Our Technology arrow_forwardPoor Grouting Quality, Broken Rock & Weak Anchorage
In broken rock, weak ground, and dynamic pressure roadways, standard cable bolts and traditional grouting methods may face problems such as poor grout delivery, pipe deviation, grout segregation, weak anchorage, and unstable surrounding rock control.
Poor Grouting Quality
Conventional cable bolts usually require separate grouting pipes, making delivery unstable and prone to failure under pressure.
Grouting Pipe Deviation
External pipes may shift or bend during installation, leading to uneven distribution or complete blockage of flow.
Grout Segregation
Grout may separate into constituent parts or fail to fill micro-fractures in the rock mass effectively.
Insufficient Anchorage
Fractured or weathered rock layers may not provide the necessary surface area for high-strength bonding.
Weak Ground Deformation
Soft ground deforms repeatedly under geological stress, compromising the integrity of standard bolt installations.
Secondary Rehabilitation
Existing infrastructure requires secondary support or repair to maintain safety in maturing mine sectors.
These Problems Need More Than a Standard Cable Bolt
See How Hollow Grouting Cable Bolts WorkHow Hollow Grouting Cable Bolts Combine Grouting Reinforcement & Cable Bearing
Cement Grout Filling, Rock Mass Bonding & Prestressed Cable Support in One System. Engineered to stabilize broken rock mass and dynamic pressure environments seamlessly.
Grouting Reinforcement
Pressurized grout is injected through the hollow core, filling the borehole and penetrating surrounding rock fractures to stabilize the mass.
Cable Bearing Support
The high-strength steel cable provides immediate and long-term tension capacity, resisting ground movement through high tensile strength.
Cable-Grout-Rock Coupling
The cured grout creates a permanent mechanical bond between the cable and the rock, forming a high-performance composite support system.
Why This Working Principle Matters in Broken and Weak Ground
View Product SolutionsHollow Grouting Cable Bolt Solutions for Underground Support
We provide high-performance solutions for mining roadways, broken rock reinforcement, weak ground, dynamic pressure areas, and tunnel reinforcement.
Standard Hollow Grouting Cable Bolt
Integrated load-bearing and grouting channel for consistent support performance.
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High-Pressure Grouting Cable Bolt
Specifically designed for high-pressure injection to fill deep rock fractures.
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High-Strength Hollow Cable Bolt
Optimized for maximum bearing capacity and critical prestress support requirements.
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Dynamic Pressure Roadway Cable Bolt
Engineered for mining roadways experiencing repeated deformation and movement.
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Broken Rock Reinforcement Cable Bolt
Designed for fractured, loose, and weak rock masses requiring deep bonding.
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Custom Hollow Grouting System
Fully customized length, strength grades, and borehole matching for specific projects.
VIEW DETAILS arrow_forwardNeed Help Choosing the Right Hollow Grouting Cable Bolt? Our engineering team can assist with technical selection based on your rock mass conditions.
GET PRODUCT RECOMMENDATIONCore Technical Parameters of Hollow Grouting Cable Bolt
Diameter, Strength Grade, Breaking Load & Grouting Pressure Specifications designed for optimal underground safety and reliability.
| Parameter | Specification | Unit | Selection Meaning |
|---|---|---|---|
| Nominal Diameter | 22 | mm | Determines core strength and borehole diameter matching. |
| Strength Grade | 1860 / 2060 | MPa | Material tensile strength rating for high-load environments. |
| Breaking Load | ≥ 520 | kN | Ultimate carrying capacity before mechanical failure. |
| Elongation | ≥ 7.7 | % | Measures ductility and ability to absorb rock deformation. |
| Grout Pressure | ≥ 10 | MPa | Capacity to handle high-pressure fluid injection systems. |
| Available Length | 3 - 12 | m | Customizable length for different roadway and tunnel heights. |
| Borehole Diameter | 42 - 56 | mm | Standardized for common drilling equipment specifications. |
22mm Diameter
Optimized geometry to ensure maximum grout flow area while maintaining a compact profile for standard boreholes.
1860/2060 MPa Grade
Utilizes high-grade aerospace-level steel alloys to provide superior tensile strength in high-stress zones.
≥520kN Load
Tested to exceed safety margins for underground support, preventing catastrophic failures in broken strata.
≥10MPa Pressure
Internal structure reinforces the hollow channel to withstand high-pressure grouting without deformation.
3-12m Length
Flexible manufacturing allows for exact length specifications to meet unique geological anchoring requirements.
42-56mm Borehole
Compatible with industry-standard pneumatic and hydraulic drilling equipment for rapid installation.
How to Read These Parameters for Project Selection? Every mining project has unique geological challenges. Our technical team is ready to analyze your site data.
SEND YOUR REQUIRED PARAMETERSComplete Hollow Grouting Cable Bolt Structure
Hollow Cable Body, Grouting Channel, Stopper, Anchorage, Plate & Grouting Connector. Every element is engineered to deliver superior structural reinforcement.
Hollow Cable Body
Main load-bearing and channel carrier.
Eight-Strand Wires
Provides high tensile capacity prestressed steel.
Grouting Channel
Central hollow path for cement grout delivery.
Anchorage Sections
Supports load transfer and reinforcement.
Grout Stopper
Seals borehole opening to prevent leakage.
Locking Components
Locks cable body and maintains prestress.
Bearing Plate
Transfers force to the rock surface effectively.
Grouting Connector
Fast connection for high-pressure injection.
Why Complete Component Matching Matters for Your Project
Ask for System Component MatchingHigh-Pressure Grouting through the Hollow Cable Body
No Extra Grouting Pipe, More Reliable Grout Delivery, Better Rock Fracture Filling. Directly reinforces surrounding structures.
Direct Channel
Cable Body as Grouting Channel reduces need for external pipe.
Optimized Path
No extra pipe needed avoids deviation and misalignment issues.
High Pressure
Direct injection into rock fractures ensures structural integrity.
Bottom-Up Filling
Improves filling completeness and air displacement.
Fracture Bond
Reliably penetrates and bonds loose rock mass fragments.
Why Integrated Grouting Improves Support Reliability
Check Grouting Requirements arrow_forwardPrestress, Rock Mass Bonding & Composite Load-Bearing System
High-Capacity Cable Support Combined with Grouted Rock Mass Reinforcement for Extreme Geological Conditions.
High-Capacity Cable Bearing
Provides massive load-bearing support for large-span underground structures and heavy rock loads.
Prestress Active Support
Restrains rock deformation immediately upon installation and improves active structural performance.
Rock Mass Bonding by Grout
Fills complex fractures with high-pressure grout to restore and improve surrounding rock integrity.
Composite Load-Bearing System
Cable, grout, and reinforced rock work in unison for unmatched structural reliability and longevity.
From Single Cable Support to Composite Ground Reinforcement
Get Support System Recommendation chevron_rightStandard Installation Process for Hollow Grouting Cable Bolt
A systematic eight-step approach ensuring maximum structural integrity through precision engineering and rigorous quality control.
Borehole Drilling
Drill according to specified depth and diameter using precision mining equipment.
Borehole Cleaning
Remove rock chips and debris with high-pressure air or water to ensure bonding.
Cable Bolt Installation
Carefully insert the assembled bolt into the designed position within the rock mass.
Grout Stopper Installation
Seal the borehole opening to prepare for high-pressure grout injection.
High-Pressure Grouting
Inject cementitious grout through the hollow channel until the design pressure is reached.
External Anchorage
Install the bearing plate and locking components after the grout reaches initial strength.
Tensioning & Locking
Apply stage-based prestress using hydraulic jacks and secure the anchorage system.
Anchor Sealing
Seal the anchor head to eliminate environmental corrosion risks for long-term stability.
Core Quality Control Points
Need Installation Guidance for Your Mining or Tunnel Project?
Ask for Installation Support engineeringReliable Grouting, High Bearing Capacity & Active Support
Integrated Cable Bearing and Grouting Reinforcement for Demanding Ground Conditions.
Coupled Support System
Cable bearing and grouting reinforcement work together to form a cable-grout-rock composite support system.
Reliable Grouting Quality
The hollow cable body acts as the grouting channel, helping avoid pipe deviation, grout delivery instability, and poor filling quality.
High Bearing Capacity
The high-strength prestressed cable body provides strong load-bearing support for underground roadways, tunnels, and large chambers.
Suitable for Weak Ground
High-pressure grouting fills fractures, bonds loose rock, and improves the integrity of broken and weak surrounding rock.
Active Prestress Support
After tensioning, prestress helps restrain surrounding rock deformation and improves active support performance.
Simplified Installation
No additional grouting pipe is required, reducing installation complexity and improving construction efficiency.
One Cable Bolt System for Bearing, Grouting and Reinforcement
Get Technical SupportDynamic Pressure Roadways, Broken Rock, Tunnels, Slopes & Large Chambers
Hollow Grouting Cable Bolt Solutions for Demanding Underground and Rock Reinforcement Projects.
Dynamic Pressure Mining Roadways
For deep mining roadways affected by dynamic pressure, repeated deformation, and unstable surrounding rock.
Broken Rock Roadway Support
For fractured, loose, and weak surrounding rock, high-pressure grouting fills cracks and bonds broken rock.
Roadway Rehabilitation & Reinforcement
For existing roadways requiring repair, strengthening, or secondary support.
Tunnel Weak Ground & Fault Zones
For tunnels in weak surrounding rock, fault fracture zones, and unstable ground conditions.
Advanced Support & Slope Reinforcement
For advanced support in tunneling and fractured rock slope reinforcement applications.
Large Chambers & Roadway Intersections
For large underground chambers and roadway intersections requiring high-capacity support solutions.
Not Sure Whether Your Ground Condition Fits?
Get Application RecommendationHow to Select the Right Hollow Grouting Cable Bolt
Match Ground Conditions, Borehole Diameter, Cable Length, Load Requirement and Grouting Pressure for maximum structural integrity.
Analyze Strata
Determine geological stability and rock mass quality to establish the baseline anchor requirements for high-pressure environments.
Define Borehole
Calculate precise borehole diameter to ensure optimal grout flow and cable clearance within the drill hole architecture.
Specify Length
Identify the required cable depth to reach stable anchorage zones beyond the failure plane of the active rock mass.
Assess Loads
Match ultimate tensile strength to the project's static and dynamic load requirements for long-term structural safety.
Set Pressure
Determine the necessary grouting pressure needed to fully saturate the borehole and provide the required bonding strength.
Apply Prestress
Decide if active prestressing is required to mitigate immediate rock deformation upon installation of the anchor system.
Evaluate Life
Select corrosion protection levels based on the permanent or temporary nature of the support service life required.
Verify System
Cross-reference all components, including plates and connectors, for full system compatibility before site deployment.
Ground Condition
Optimized for fractured or soft rock strata requiring deep reinforcement.
Borehole Diameter
Standardized sizing from 42mm to 110mm for diverse drill rigs.
Cable Length
Custom fabrication from 3m to 25m to meet exact site specifications.
Design Load
Load bearing capacities engineered from 300kN up to 1000kN+ per unit.
Grouting Pressure
Internal hollow core supports high-pressure injection up to 10MPa.
Prestress Requirement
Compatible with standard hydraulic tensioners for active rock support.
Support Service Life
Available in black, galvanized, or epoxy-coated steel for long-term use.
System Components
Complete kits including dome plates, wedges, and grout stoppers.
Need help with selection parameters? Our engineering team is ready to assist.
Request Selection SupportCustom Manufacturing & Quality Support from China Factory
Direct-to-project manufacturing solutions designed for complex geotechnical engineering. We provide integrated supply chain support for global mining and tunneling operations.
- check_circle China Factory Direct Supply
- check_circle Project-Based Specification Matching
- check_circle Custom Lengths & Tensile Strength
- check_circle Bulk Mining Delivery Logistics Support
Rigorous QC Protocol
Length Customization
Precise cutting services to meet unique geological profiles and anchorage depths for specialized mining shafts.
Strength Grading
Multiple steel grade options to match high-load design requirements for deep-level underground excavation support.
Borehole Match
Component engineering to ensure seamless integration with local drilling equipment and borehole diameter variations.
Grout Stoppers
Custom-molded sealing solutions designed for high-pressure grouting applications in fractured rock zones.
Anchorage/Plate
High-strength dome plates and triple-wedge systems tailored to specific rock surface angles and bearing needs.
Connector Kits
Robust coupling systems for multi-stage installation in restricted headroom environments and long-reach anchoring.
Technical Packing
Marine-grade export packaging ensuring corrosion-free transit and efficient on-site storage for large-scale projects.
Bulk Supply
Optimized manufacturing timelines and logistical routing for consistent supply to major international infrastructure sites.
Looking for reliable direct-from-factory manufacturing?
Request Custom Manufacturing SupportGet Custom Hollow Grouting Cable Bolt Solutions from China Factory
Connect with our engineering team for project-specific specifications, direct factory pricing, and global logistics support.
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China Factory Direct
Eliminate middleman costs with direct-from-source pricing and strict quality control.
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High-Pressure Grouting
Direct slurry injection into rock fractures to restore and improve surrounding ground integrity.
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Custom Specification
Tailored cable lengths, diameters, and strength grades engineered for your site.
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Project Selection Support
Technical consultation from our engineers to match load-bearing and grouting requirements.
Request Direct Factory Quotation
Connect directly with our engineering team to get custom-designed solutions that minimize downtime and cut procurement costs.