CT Rock Bolt | Special Combination Anchor Bolt for Hard Rock Roadway and Tunnel Support

Product Overview

The CT rock bolt is a special support bolt designed for hard rock underground engineering. It is commonly used in mining roadways, tunnel excavation, underground chambers, and rock reinforcement projects that require fast initial support. This type of bolt usually combines mechanical end anchoring with subsequent grouting reinforcement, allowing it to provide support shortly after installation while improving the bonding effect between the bolt and surrounding rock through grouting.

Compared with ordinary single-anchor systems, the CT rock bolt focuses on a combined support effect of fast installation, early load bearing, and later-stage reinforcement. For tunneling, mining, and underground construction sites, it helps improve support efficiency, enhance surrounding rock stability, and provide a more reliable foundation for shotcrete, steel mesh, or secondary support systems.

Key Features

• Suitable for hard rock support conditions: Ideal for mining roadways, tunnel faces, underground chambers, and relatively stable hard rock formations.
• Combined support design: Integrates mechanical anchoring and grouting reinforcement to meet both initial and long-term support requirements.
• High installation efficiency: Suitable for continuous excavation and rapid support operations, helping shorten the support cycle.
• Reliable support performance: Used with plates, nuts, grout materials, and other accessories to improve load transfer between the bolt and surrounding rock.
• Customizable for engineering projects: Length, rod specification, bearing plate, nut, and anti-corrosion treatment can be matched according to project requirements.

Typical Applications

CT rock bolts are mainly used in underground mines, metal mines, hard rock roadways, transportation tunnels, hydraulic tunnels, underground powerhouses, and other rock reinforcement projects. For excavation faces that require rapid support, CT rock bolts can be used together with steel mesh, shotcrete, cable bolts, or other support components to form a composite support system.

During hard rock excavation, surrounding rock may experience joint cracks, local loose blocks, or structural plane movement. CT rock bolts help connect shallow loose rock with deeper stable rock through anchoring and grouting, improving the overall integrity of the surrounding rock and reducing the risk of local rock fall, sidewall spalling, and roof instability.

Product Specification Table

Structure and Installation

A CT rock bolt usually consists of a bolt rod, end anchoring component, bearing plate, nut, and grouting-related accessories. During installation, a borehole is drilled according to the support design. The bolt is then inserted into the hole and mechanically anchored at the end, allowing it to participate in surrounding rock support quickly. After that, grouting can be carried out according to the construction plan, filling the gap between the borehole wall and the bolt body to enhance bonding between the bolt and rock mass.

This installation method is suitable for fast excavation cycles and working faces with high initial support requirements. Mechanical anchoring provides early support, while grouting improves long-term support performance, balancing construction efficiency and structural stability.

Purchasing and Customization Tips

To match different engineering projects, CT rock bolts can be specified according to customer drawings, support parameters, or site conditions. When requesting a quotation, buyers are encouraged to provide roadway section information, rock conditions, borehole diameter, required length, anchoring force requirements, anti-corrosion needs, packaging requirements, and order quantity. This helps ensure faster selection and more accurate pricing.

FAQ

Is the CT rock bolt suitable for soft rock?
CT rock bolts are more commonly used for hard rock or relatively intact rock formations. For soft rock, fractured rock, or highly jointed ground conditions, the appropriate anchoring solution should be selected according to site conditions and support design.

Can CT rock bolts be used together with shotcrete and steel mesh?
Yes. CT rock bolts are often used with steel mesh, shotcrete, cable bolts, and other support components to form a composite support system and improve the stability of roadways or tunnels.

Can the specifications be customized?
Yes. Length, rod specification, bearing plate size, anti-corrosion treatment, and packaging can all be confirmed according to project requirements.

Who is this product suitable for?
It is suitable for mining contractors, tunnel construction companies, underground engineering support material buyers, mining equipment suppliers, and rock engineering project owners.

Contact Us for a Customized Solution

If you are looking for a suitable CT rock bolt solution for mining roadways, hard rock tunnels, underground chambers, or other rock support projects, please contact us for technical selection and quotation support. We can help confirm suitable product specifications based on your project drawings, rock conditions, borehole diameter, required length, anchoring force, bearing plate configuration, and anti-corrosion requirements.

You can provide us with your project conditions, purchase quantity, target delivery time, and packaging requirements. We will match the appropriate CT rock bolt configuration and provide a customized support material solution. Whether you need sample testing, bulk purchasing, or project-based supply, we can offer flexible support according to your actual needs.