Combo Bolt

Product Overview

Combo Bolt is a combination rock support bolt designed for mining roadways, tunnels, and underground engineering support. It is suitable for applications that require rapid initial support as well as long-term reinforcement of surrounding rock. The product combines mechanical anchoring with subsequent grouting support, providing immediate anchoring force during installation and forming a more stable full-length bonded support through resin or cement-based grout. This helps improve the overall stability of roof, sidewall, and fractured rock areas.

Key Features

• Immediate Support: The bolt can provide initial support force through end mechanical anchoring after installation, making it suitable for excavation cycles that require fast support efficiency.
• Long-Term Reinforcement: It can be used with resin or cement-based grout to create a more complete load-bearing system between the bolt and surrounding rock.
• Suitable for Complex Ground Conditions: Applicable to weak, fractured, or layered rock formations in coal mines, metal mines, tunnel construction, and underground projects.
• Flexible Specifications: Bolt length, diameter, bearing plate, nut, anti-corrosion treatment, and grouting method can be configured according to project conditions and purchasing requirements.
• Ideal for Bulk Procurement: Customization is available based on drawings, samples, or project parameters, making it suitable for mining contractors, equipment suppliers, and support material buyers.

Specification Reference

Applications

Combo Bolt can be used in underground mine main roadways, stoping roadways, transportation roadways, intersections, chambers, and tunnel support projects. For projects that require rapid control of surrounding rock deformation followed by grouting for long-term stability, the combination bolt offers both construction efficiency and reliable support performance. When used together with steel mesh, bearing plates, W straps, or other support systems, it can further improve local rock confinement.

Structure and Installation

The product generally consists of a high-strength bolt body, threaded end, mechanical anchoring component, bearing plate, nut, and grouting-related accessories. During installation, holes are drilled according to the required diameter and depth. The bolt is inserted into the hole and mechanically anchored at the end to provide initial support. Grouting is then carried out according to the construction plan, allowing the grout to fill the gap between the bolt and the borehole wall, improving bonding and load transfer between the bolt and the surrounding rock.

Actual borehole diameter, hole depth, pre-tension force, grouting material, and curing time should be determined according to geological conditions, support design, and on-site construction requirements.

Purchasing Tips

When purchasing Combo Bolt, it is recommended to provide bolt diameter, length, steel grade, surface treatment, bearing plate size, nut specification, grouting method, packaging requirements, and target application. For export orders, labeling, shipping marks, packing method, and destination port requirements can also be confirmed to speed up quotation and production arrangements.

FAQ

Q1: What is the difference between Combo Bolt and ordinary rock bolts?
Combo Bolt focuses more on combined support performance. It usually integrates mechanical anchoring and grouting reinforcement, making it suitable for working conditions that require both initial support and long-term stability.

Q2: Can the size be customized?
Yes. Bolt diameter, length, bearing plate, nut, anti-corrosion treatment, and packaging can be confirmed according to drawings or project requirements.

Q3: Is it suitable for coal mines or metal mines?
This type of product can be used in coal mines, metal mines, tunnels, and underground engineering projects. The final selection should be based on ground conditions, support design, and construction equipment.

Q4: How can I get a quotation?
Please provide specifications, quantity, material requirements, surface treatment, accessories, and delivery location. We can provide a suitable solution and quotation according to your project requirements.

Contact Us for a Customized Solution

If your project requires Combo Bolt for mining roadways, tunnels, or underground engineering support, please contact us for a customized solution. We can help confirm bolt diameter, length, steel grade, bearing plate size, nut specification, surface treatment, grouting method, and packaging solution based on your drawings, samples, or on-site support parameters.

Our team can match suitable product specifications and supply solutions according to different geological conditions, support designs, and purchasing requirements. Send us your project requirements, and we will provide specification confirmation, quotation, and delivery suggestions as soon as possible.