With the bearing plate in place, the tube is driven into a slightly smaller hole, using the same standard percussion drill that made the hole. As the tube of the rock bolt sliders into place, the full length of the slot narrow, causing radial pressure to be exerted against the rock over its full contact length.

Big friction between bolt and rock.

The height of the tunnel must be larger than the bolt length.

Friction bolt is a new bolt of full length anchoring and active reinforcing surrounding rock. And it is a high strength steel pipe with longitudinal slit.

Mining friction bolt mainly used in supporting mine lanewway and mountain tunnel.

Install the friction bolt in a bore which smaller than the pipe diameter.

At this time, three forces will be applied to the surrounding rock.

Friction bolt entire length range give radial pressure on the hole wall.

Friction force to prevent the surrounding rock from falling.

Friction bolt’s plate bearing force.

These three forces make the surrounding rock more stable.

Technical characteristics:

Material adopt high-strength alloy strip steel,

The installation is the simplest,

Don’t need resin cartridges.

The friction force between the friction bolt and the rock mass is large.

Bear high shear resistance and tensile strength.

Equipped with high-strength plate, evenly force.

The height of the tunnel is higher than the length of the bolt.

Coal mines in Vietnam are generally situated in the north, in Quang Ninh province and they produce thermal coal, ideal for the use in power stations to make electricity. It is no accident that Pha Lai, one of the largest coal fired power stations in Vietnam is situated near the area. However, Pha Lai is not the only, nor is it the largest. There is a power complex, Mong Duong I and II Power plants which will be significant players in the power station business in the years to come. Currently, Mong Duong I is under construction and Mong Duong II, after many fits and starts, including the withdrawal of Vinacomin from the project and the entry of Korean and Chinese players, looks finally going ahead.

This customer placed an order of 1000 sets of SS33 split set rock bolt with 1.2 meters and 1.5 meters length with galvanized finish.

We have experience to export mining support products to Vietnam. And good knowledge of mine resources in Vietnam. If you have any question about this, we can provide help.