Epoxy Self-Drilling Anchor System for Tunneling Mining Roof Bolting High-Strength Bolt Anchors

Epoxy Self Drilling Anchor System Anchor Bolt for Tunneling Mining Roof Bolting

During application, the biggest influence on the service life of anchor bolt is the corrosion of surrounding environment, so corrosion resistance is important to anchor bolt. In order to meet customer's demand, a variety of anti-corrosion anchor bolt systems are provided, such as hot dip galvanizing anchor bolt, epoxy coating anchor bolt and the duplex (multiple) coating anchor bolt.

Hot-dip Galvanizing Rock Bolts System

Hot-dip galvanizing rock bolt is a sda rock bolt with good anti-corrosion property. It forms a protective layer by putting clean-surface products into molten galvanizing zinc, which has good effect on the anti-corrosion of steel.

Features and Advantages:

Excellent anti-corrosion properties: protect the steel by battery effect.
Long service life: service life far exceeds that of any other coatings.
Full protection: products are fully protected and anti-corrosion effect is better.
Lower price: cost is lower. Zinc coating is more durable than others, and does not require maintenance in the future.
Service Life: Generally, the service life of hot-dip galvanized products is more than 50 years in most environments.

Stainless Steel Self Drilling Anchor Bolt

Stainless steel self drilling anchor bolt adopts alloy steel materials and has super-high anti-corrosion effect. It is suitable for several complex and weak geological conditions.

Features and Advantages:

Good anti-corrosion quality and antioxidant activity.
High temperature oxidation resistance, resisting fire at a certain extent.
Stainless steel has good strength and high wear resistance.
Its anti-corrosion and resistance to chloride is prior to other coating re-bars due to its repairing oxide layer.

Duplex Coating Rock Bolt

The duplex coating is a combination of hot-dip galvanizing coating and epoxy coating. The steel is first hot dip galvanized, and then the epoxy coating is sprayed on its surface. Through double anti-corrosion process, the steel products can have better anti-corrosion performance and be safer. It can not only resist common chemical corrosion and electrochemical corrosion, but also work well under acidic and stray current environment.

The duplex coating anchor bolt is commonly used in the permanent support of hydro-projects, underwater tunnels, subway tunnels and some important buildings affected by groundwater for a long time. And it is also widely used in harbors, wharfs, offshore buildings that are corroded by seawater.

Products Details

R-thread Self Drilling Anchor Bolt Size	R25, R32, R38, R51
T-thread Self Drilling Anchor Bolt Size	T30, T40, T52, T76, T103, T111, T127, T130, T150, T200
Self Drilling Anchor Bolt Max. Tensile Load	200kN-142300kN
Self Drilling Anchor Bolt Yield Load	150kN-9500kN
Self Drilling Anchor Bolt Standard length	Any length according to construction requirement, regular size 3m, 4m, 6m, 8m
Self Drilling Anchor Bolt Usage	Drilling, Placement of steel reinforcing elements, Grout placement
Self Drilling Anchor Bolt Application	slope stabilization, tunneling pre-support, foundations with micropiles etc.

We supply all the Self Drilling Anchor Bolt accessories including anchor bits, coupling, spherical nuts, plates, and stopper.

Why Choose Us

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We are a leading geotechnical engineering provider. We provide a wide range of geotechnical services, from soil nailing to rock drilling, all carried out by highly qualified engineering specialists. We have a real focus on providing value, meaning the highest quality product and specialist contractor services for very competitive prices.

SDA Bolt Application

Self Drilling Anchor Bolt is mainly used in slope stabilization, tunneling pre-support, foundations with micropiles, it is also widely used in the railway system, metro project etc.

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Frequently Asked Questions (FAQ)

What types of anti-corrosion self-drilling anchor bolts are available?

A variety of systems are provided, including hot-dip galvanizing anchor bolts, epoxy coating anchor bolts, and duplex (multiple) coating anchor bolts.

What are the advantages of hot-dip galvanizing rock bolts?

They offer excellent anti-corrosion properties by protecting the steel through battery effect, have a long service life exceeding 50 years in most environments, provide full-coverage protection, and require no future maintenance.

What is a duplex coating rock bolt and where is it used?

A duplex coating combines hot-dip galvanizing with an outer epoxy coating. It is highly resistant to chemical, electrochemical, and acidic corrosion. It is commonly used in hydro-projects, underwater/subway tunnels, and offshore buildings.

What sizes do the R-thread and T-thread anchor bolts come in?

R-thread self-drilling anchor bolts are available in sizes R25, R32, R38, and R51. T-thread self-drilling anchor bolts are available in T30, T40, T52, T76, T103, T111, T127, T130, T150, and T200.

What are the main applications of self-drilling anchor bolts?

They are primarily used in slope stabilization, tunneling pre-support, foundations with micropiles, and are widely implemented in railway and metro construction projects.

Do you supply all the necessary accessories for these anchor bolts?

Yes, we supply all matching accessories including anchor bits, couplings, spherical nuts, plates, and stoppers to ensure a complete installation system.