Rock Bolt Manufacturer & Rock Reinforcement Solutions
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Asia's Leading Manufacturer of
Large-Diameter Hollow Anchor Bars

Sinorock is a leading manufacturer of anchoring solutions, specializing in the development, production, and global supply of high-quality anchoring products.

With over 20 years of manufacturing experience, our products are used in more than 80 countries worldwide.

Operating two production facilities with over 100 advanced machines and 20 automated hollow anchor bar production lines, Sinorock is Asia’s leading supplier of large-diameter self-drilling anchor bars, with manufacturing capabilities up to 200 mm in diameter.

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Product Categories

Sinorock provides reliable self-drilling anchor systems and rock reinforcement products engineered for challenging construction environments worldwide

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R28-self-drilling-anchor-bolt
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R38-self-drilling-anchor-system
R51-self-drilling-rock-bolt

Applications

Reliable Solutions for
Mining Operations

Self-drilling rock bolts provide efficient support for open-pit slopes and underground excavations. They improve rock stability, accelerate excavation progress, and reduce overall support costs in challenging mining conditions.

Advanced Solutions for
Safe Tunnel Construction

Designed for demanding tunnel environments, self-drilling anchor systems enhance ground stability and improve construction efficiency.

Strong Solutions for
Foundation Projects

Self-drilling anchor bolts effectively transfer structural loads, improve bearing capacity, and provide reliable reinforcement for foundations, bridges, towers, and other critical infrastructure projects.

Effective Solutions for
Slope Stabilization

Self-drilling rock bolts strengthen unstable slopes by resisting tensile and shear forces. They are widely used for slope protection, retaining structures, rockfall prevention, and embankment stabilization.

OUR SERVICE ADVANTAGES

One-Stop
Rock Reinforcement Solutions

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20+ YEARS OF EXPERTISE

Extensive experience in geotechnical anchoring, delivering optimized solutions for diverse geological and construction conditions.

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FULL-PROCESS SERVICE

Supporting every project stage from investigation and testing to training and site assistance, ensuring efficient and successful implementation.

Latest News

Company News

July 2026 — SINOROCK successfully completed its annual Quality Month Campaign with the theme of “Addressing Customer Feedback and Eliminating Quality Risks Across the Entire Process.”

The campaign aimed to strengthen employees’ quality awareness, encourage full participation in quality management, and build a company-wide culture where everyone values, contributes to, and continuously improves product quality.

Throughout the month, SINOROCK organized a series of activities, including quality awareness meetings, customer complaint reviews, quality risk inspections, quality knowledge competitions, professional training sessions, and internal quality communication activities. These initiatives further integrated quality management into every department and every stage of production.

Customer Feedback Drives Continuous Improvement

Customer Feedback Drives Continuous Improvement

Customer feedback is an essential source for identifying potential quality issues and improving products and processes.

During Quality Month, SINOROCK conducted customer complaint review meetings, analyzing real cases from customer feedback, identifying root causes, and developing targeted improvement measures.

Through these case studies, employees gained a deeper understanding of how product quality impacts customer satisfaction and project performance. By transforming customer feedback into practical improvement actions, SINOROCK continues to optimize its quality management system and enhance product reliability.

Quality Is Everyone’s Responsibility

Quality Is Everyone’s Responsibility

Quality is not only the responsibility of the quality department — it is a commitment shared by every employee.

During the “Everyone Talks About Quality” communication sessions, employees from different positions shared their understanding of quality based on their daily work and responsibilities.

At the same time, SINOROCK organized a company-wide quality risk inspection activity. Employees actively participated in identifying potential risks within production processes, reporting issues, and proposing improvement suggestions.

These activities helped strengthen employees’ ability to identify and prevent quality problems, promoting a transition from “solving problems after they occur” to “preventing problems before they happen.”

Improving Skills Through Learning and Competition

SINOROCK 2026 Quality Month

To further enhance employees’ professional knowledge and practical quality control capabilities, SINOROCK carried out various training sessions and competitions during Quality Month.

The “Product Matching Challenge” focused on 15 similar and easily confused product types. Participants were evaluated on their product identification accuracy and completion efficiency, improving their understanding of product specifications and classifications.

SINOROCK also organized a Quality Knowledge Competition featuring a 200-question quality knowledge database. The competition combined theoretical knowledge with real quality cases from company records, helping employees better understand quality standards and practical problem-solving methods.

In addition, professional training sessions were conducted, including:

  • Hardness tester operation training;
  • Product inspection knowledge sharing;
  • Inspection procedures and standards training;
  • Product inspection specification training.

These programs further improved employees’ capabilities in product inspection, process control, and quality assurance.

Strengthening Quality Awareness Through Real Cases

During Quality Month, SINOROCK held quality awareness meetings in different locations.

On July 13. the Quality Warning Conference was organized in Changzhou. On July 14. similar meetings were held at the Luoyang office and Luoyang branch.

Through reviewing quality-related cases and sharing lessons learned, these meetings further reinforced employees’ understanding of the importance of product quality and encouraged everyone to take greater responsibility for quality improvement.

Quality Is a Long-Term Commitment

Quality Is a Long-Term Commitment

Although Quality Month was carried out throughout July, SINOROCK’s commitment to quality improvement extends far beyond a one-month campaign.

Through meetings, practical training, competitions, inspections, and internal communication activities, quality awareness has been further integrated into daily operations.

“Addressing Customer Feedback and Eliminating Quality Risks Across the Entire Process” represents not only the theme of the 2026 Quality Month Campaign but also SINOROCK’s long-term commitment to customer-oriented quality management.

Moving forward, SINOROCK will continue to focus on customer needs, strengthen quality control throughout the entire production process, proactively identify and eliminate potential risks, and continuously improve product quality and service capabilities.

Driven by continuous improvement and a strong commitment to quality, SINOROCK will continue providing reliable, high-quality self-drilling anchor bolt products and engineering solutions to customers worldwide.

In tunneling, pre-support refers to techniques used to stabilize the ground ahead of the tunnel face before main excavation. This is particularly important in weak, fractured, or water-bearing soils to prevent collapses, excessive deformation, and water inflow, ensuring safety and maintaining construction quality.

1. Classification of Tunnel Pre-Support Methods

Based on the mechanism and construction method, tunnel pre-support methods can be classified into four major categories:

1.1 Pipe Roofing and Umbrella Arch

Pipe roofing and umbrella arch methods stabilize the ground by inserting steel pipes along the tunnel crown outside the excavation profile, forming a rigid arch to support the overlying soil. They provide high stiffness and strong load-bearing capacity.

Pipe Roofing / Umbrella Arch: Suitable for tunnel portals, shallow tunnels, or crossing important structures or faulted zones where settlement control is critical.

Pipe Canopy Method: Commonly used for large-section or shallow tunnels, especially under railways or rivers, forming a temporary waterproof enclosure.

Jet-Grouting Pipe Roof: For soft, saturated, and flowable soils; forms a consolidated shell combining strength and waterproofing.

Steel Tube Slab (STS) Pipe Roof: Provides extremely high stiffness for tunnels under critical infrastructure, controlling settlement to minimal levels.

Freeze-Sealing Pipe Roof (FSPR): Combines pipe roof and freezing for shallow, large-section tunnels in high water or soft soils.

1.2 Forepoling and Small Pipes

These methods insert inclined rods or small pipes ahead of the tunnel face to connect the ground with the support structure, providing reinforcement and stability.

Rock Bolts: Suitable for low-stress, fractured rock with low groundwater.

Small Pipe Canopy / Forepoling: Common in shallow tunnels with class IV or higher rock; cost-effective and flexible.

Self-Drilling Anchors: Ideal for broken, loose, or unboreable soils, such as fault zones, gravel, or fill.

Glass Fiber Reinforced Polymer (GFRP) Bolts: Can be cut directly by tunnel boring machines (TBM), used at TBM launch or arrival zones.

1.3 Grouting and Jet Grouting

Grouting techniques inject cementitious or chemical grout into the soil to fill voids, consolidate the ground, and reduce permeability.

Pre-Grouting: Effective in fractured rock, fault zones, and water-bearing sands, enhancing strength and reducing permeability.

Horizontal Jet Grouting: For soft, saturated soils (mud, silt, clay, fine sand), forming continuous reinforced waterproof barriers.

Sleeve Valve Pipe Grouting: Used in non-homogeneous soils, allowing precise control of grout injection with minimal disturbance.

1.4 Ground Freezing

Ground freezing uses artificial refrigeration to turn water in soil into ice, creating a high-strength temporary support and waterproof barrier.

Artificial Ground Freezing (AGF): Suitable for high water pressure, quicksand, and soft saturated soils that are difficult to stabilize by conventional grouting.

Freeze-Sealing Pipe Roof (FSPR): Combines pipe roofing and freezing advantages for shallow, large-section tunnels.

Saltwater and Liquid Nitrogen Freezing: Saltwater freezing for routine construction; liquid nitrogen for rapid or emergency freezing.

In practice, composite methods (e.g., pipe roof + small pipe grouting) are often used to combine the advantages of different techniques for optimal support.

2. Comparison of Tunnel Pre-Support Methods

Selecting an appropriate pre-support method requires balancing geological conditions, environmental requirements, cost, and construction speed.

Industry News

Sinorock FAQs

FAQs of Sinorock background

Find answers about Sinorock products, applications, and technical solutions.

How Are Sinorock Products Packaged?

Self-Drilling Anchor Bars

The self-drilling anchor bars are bundled according to specified quantities, usually packed in bundles in multiples of 5.

Accessories

Below T76: Accessories are first packed in cartons and then placed on wooden pallets for final packaging.

T76 and above: Accessories are directly packed into wooden cases.

For some special-shaped or oversized accessory products, wooden case packaging is also generally used directly.

For products of T52 and below, the quantity per box is usually packed in multiples of 5. For accessories above T52, wooden cases are customized according to the product quantity.

The quantity of bars per bundle and accessories per box follows specific packaging standards. For detailed packaging data, please leave a message or contact us by email.

How Are Sinorock Products Packaged?

Self-Drilling Anchor Bars

The self-drilling anchor bars are bundled according to specified quantities, usually packed in bundles in multiples of 5.

Accessories

Below T76: Accessories are first packed in cartons and then placed on wooden pallets for final packaging.

T76 and above: Accessories are directly packed into wooden cases.

For some special-shaped or oversized accessory products, wooden case packaging is also generally used directly.

For products of T52 and below, the quantity per box is usually packed in multiples of 5. For accessories above T52, wooden cases are customized according to the product quantity.

The quantity of bars per bundle and accessories per box follows specific packaging standards. For detailed packaging data, please leave a message or contact us by email.

How Are Sinorock Products Packaged?

Self-Drilling Anchor Bars

The self-drilling anchor bars are bundled according to specified quantities, usually packed in bundles in multiples of 5.

Accessories

Below T76: Accessories are first packed in cartons and then placed on wooden pallets for final packaging.

T76 and above: Accessories are directly packed into wooden cases.

For some special-shaped or oversized accessory products, wooden case packaging is also generally used directly.

For products of T52 and below, the quantity per box is usually packed in multiples of 5. For accessories above T52, wooden cases are customized according to the product quantity.

The quantity of bars per bundle and accessories per box follows specific packaging standards. For detailed packaging data, please leave a message or contact us by email.

How Are Sinorock Products Packaged?

Self-Drilling Anchor Bars

The self-drilling anchor bars are bundled according to specified quantities, usually packed in bundles in multiples of 5.

Accessories

Below T76: Accessories are first packed in cartons and then placed on wooden pallets for final packaging.

T76 and above: Accessories are directly packed into wooden cases.

For some special-shaped or oversized accessory products, wooden case packaging is also generally used directly.

For products of T52 and below, the quantity per box is usually packed in multiples of 5. For accessories above T52, wooden cases are customized according to the product quantity.

The quantity of bars per bundle and accessories per box follows specific packaging standards. For detailed packaging data, please leave a message or contact us by email.

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