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Integrated Drilling / Self Drilling Rock Bolt For Complex Formations

Brand Name:	HLDRILL
MOQ:	10PCS
Price:	Please contact us
Payment Terms:	T/T
Supply Ability:	More than 3000 per month

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

ISO9001

Product Name:

Self-Drilling Anchor Bolt

Product Type:

Rock And Soil Anchoring Support Anchor Bolt

Structural Features:

Integrated Drill Rod And Anchor Bolt

Installation Method:

Self-drilling And Self-anchoring, One-time Molding

Material:

High-strength Alloy Steel

Performance Characteristics:

Strong Anchoring Force, Quick Construction

Applicable Scenarios:

Complex Strata, Fractured Surrounding Rock, Tunnel And Slope Support

Product Advantages:

No Casing Required, Strong Adaptability, High Hole Formation Rate

Packaging Details:

Wooden Box

Highlight:

Self Drilling Rock Bolt

Integrated Drilling Rock Bolt

Complex Formations Rock Bolt

Product Description

Self Drilling Rock Bolt with Integrated Drilling for Complex Formations

Self-drilling rock bolts are advanced geotechnical anchoring and support components that integrate drilling, anchoring, and grouting functions into a single system. Widely utilized in mining, tunneling, and slope reinforcement projects, they provide both construction efficiency and reliable structural support.

The self-drilling anchor bolt system consists of six key components working in coordination: drill bit, hollow bolt, plate, coupler, centralizer, and nut. This integrated design ensures seamless support operations in various geotechnical applications.

Core Advantages

Integrated Construction, High Efficiency: Combines drilling, grouting, and anchoring in one continuous operation, eliminating the need for separate drilling. This prevents hole collapse and rod jamming common in traditional methods, making it ideal for fractured and loose formations while significantly reducing construction time.
Stable Anchoring Effect: The hollow rod body enables high-pressure grouting throughout the entire borehole. Grout fills rock and soil fissures and gaps around the anchor rod, creating an integrated "anchor rod - grout - rock mass" system that enhances pull-out resistance and overall structural integrity.
Adaptable to Complex Working Conditions: Flexible length adjustment through connecting sleeves and interchangeable drill bits make these bolts suitable for diverse applications including mine roadway support, tunnel pre-support, slope disaster management, and foundation pit support.

Working Principle

Drilling and Hole Formation: The drilling rig rotates the self-drilling anchor bolt, with the drill bit cutting through rock and soil to form the borehole. The anchor bolt advances simultaneously, eliminating the need for additional drill rods.
High-Pressure Grouting: Cement mortar or specialized anchoring grout is injected through the hollow channel of the anchor bolt body. Grout diffuses through the drill bit's grout holes, filling gaps between the anchor bolt and borehole wall as well as rock and soil fissures.
Anchoring and Forming: After grout solidification, the anchor bolt and surrounding rock/soil form a robust anchoring structure. The nut locks the bearing plate, providing active support to resist deformation and collapse.

Difference from Traditional Rock Bolts

Comparison Dimension	Self-Drilling Rock Bolts	Traditional Rock Bolts
Construction Process	Integrated drilling, grouting, and anchoring in one continuous process	Separate steps: drill hole first, then install anchor bolt, followed by grouting
Applicable Strata	Fractured, loose, and easily collapsing formations	Relatively intact and stable formations
Construction Efficiency	High efficiency with no collapse risk	Lower efficiency, prone to drill rod jamming and borehole collapse
Anchoring Integrity	Strong anchoring with grouting applied to entire borehole section	Potential for incomplete grouting and uneven anchoring effects

Choosing Henglong Self-Drilling Rock Bolts will solve your anchoring and support challenges with superior performance and reliability.

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