SPLIT SET / FRICTION BOLT FOR UNDERGROUND MINING. Split Set Friction Bolt is a new type of rock bolt. It can apply radial pressure to the hole wall and friction to prevent the surrounding rock from sliding down. Even in the case of blasting vibration and surrounding rock moving, the anchoring force rather increases significantly in the later stage. When the surrounding rock is significantly displaced, the bolt does not lose its support resistance, and it has better characteristics than the shell rock bolt. We are manufacturer and exporters of mining support products. Our main products are Split Set / Friction Bolts, Combi Washers, Dome Plates, Pigtail Eye Bolts The character of Split Set Friction Bolt is as follows: 1. The raw material is high-strength steel. 2. Easy to install. 3. Large friction between the bolt and the rock mass. 4. Strong anti-reduction and tensile strength. 5. Equipped with a high-strength pallet.