SN-Bolts Accessories

5 Types of Rock Bolt and Their Uses

Rock bolts are essential components in many construction projects, particularly those involving tunneling and other underground work. They are used to reinforce walls, ceilings, and floors in tunnels and mines by holding fractured rock securely together. But what exactly is a rock bolt? Let’s explore the various types of rock bolts and how they are used to ensure a secure structure.

Different Types of Rock Bolt

Fully Grouted

Fully grouted involve inserting the rod into a pre-drilled hole and then filling the entire cavity with grout material or cement to anchor it securely in place. This type of system provides increased strength but requires more time for installation due to the need for drilling and filling each hole with grout prior to insertion.

Partially Grouted

Partially grouted systems involve inserting the rod into a pre-drilled hole but only partially filling it with grout material or cement before inserting it into place. This type of system provides less strength but can be installed quickly due to not needing to fill each hole with grout prior to insertion.

Fully Encapsulated Bolt

A fully encapsulated bolt type of rock bolt is the most commonly used type of rock bolt and is used to strengthen surfaces and foundations in the mining and civil construction industries. Rock bolts are specifically designed for geotechnical applications employed to stabilize tunnels, excavations, walls, and other structures built in expansive soils, fractured rocks and during seismic activities. The fully encapsulated bolt is an improved design offering superior fastening for a variety of applications requiring high levels of performance. To ensure safety and reliability, these bolts offer full encapsulation around the exposed structural elements so that any deformation or corrosion can be avoided. Their ability to resist external loads makes them ideal for stabilizing surface areas where hydrochemical stresses may be present. Using a fully encapsulated rock bolt type increases structural integrity over time, providing engineering solutions that endure through today’s toughest conditions.


The D-Bolt type of rock bolt is a highly safe and secure solution for securing construction in a variety of rocky environments. Not only can it be installed quickly and conveniently, but it also offers superior performance when compared to other fastening systems. The unique shape of the bolt increases its capacity to resist lateral and torsional loads, making it one of the strongest and most reliable anchors available on the market. What’s more, an added corrosion-resistant coating prevents any degradation of its structural integrity, ensuring it will stay an effective solution far into the future. With the ability to keep any rock-secured structure perfectly steady even during seismic events, the D-Bolt truly stands out as a superior choice for any project needing fastened reinforcement.

Inflatable Rock Bolt

An inflatable rock bolt is an innovative tool for stabilizing and reinforcing unstable or damaged surfaces or slopes. They provide a secure grip that can also be adjusted to produce maximum hold for a variety of materials, from soil to hard rock. Unlike traditional bolts and anchors, an inflatable version won’t cause vibrations that could cause further damage to unstable ground. This makes them ideal for use in areas prone to earthquakes, mudslides, landslides, river erosion, and other extreme conditions. Inflatable rock bolts are becoming increasingly popular among construction professionals who need reliable solutions for securing their structures in any environment.