What is SN-Bolt?

22 Jun.,2022

The SN-Bolts (Store Norfors) are used for mining, tunnelling and specialised civil engineering. The securing in a borehole is made by the mortar fill process where mortar is first added to the borehole, starting from the deepest level of the bore hole and then the anchor is driven into the fresh mortar.

 

SN represents “Store Norfors”. The name originates from their first application in Store Norfors in Sweden. An alternative etymology attributes SN to “soil & Nail”.

 

People call rock bolt as SN-Bolt, SN Rock Bolt, SN Anchor, which is used for mining, tunneling and specialized civil engineering. The whole set of SN bolt consists of a thread bar, s plate, a spherical washer  and a nut.

There are three major ways of anchoring the rock bolts: mechanical, grouted, and friction. The most common grout-anchored rock bolt is the fully grouted rebar, a threaded bar made of steel. Cement or resin is used as the grouting agent. A cable bolt is a reinforcing element made of steel wires in the form of a strand or rope; it is installed in the borehole with cement grout.

 

Super high duty, ultra high strength heat treatment rock bolt/ anchor bolt/ roof support system is an advanced steel products with prime quality and high performance, which can ensure the anchoring effect for complex ground conditions, such as sand and gravel to inconsistent fill, boulders, rubble and weathered rock. Raw materials are hot rolled steel rebars or deformed bars, using inductive heat treating technology (our patent). This product is widely used in tunneling, mining, slope stabilization and foundation support.

 

The SN-Bolts (Store Norfors) are used for mining, tunnelling and specialised civil engineering. The securing in a borehole is made by the mortar fill process where mortar is first added to the borehole, starting from the deepest level of the bore hole and then the anchor is driven into the fresh mortar.

 

The SN-Bolt is a complete rod anchor provided with a rolled up metric thread, plate, spherical washer and hexagonal nut. Available in different seizes.