Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Handan ZhongFu company is a professional manufacturer for underground mining supporting products with over ten year experience. We can manufacture Split sets ,friction bolt, Combi split sets, Expandable friction bolt,Swellex, Threaded bar bolt, Cable bolt, Combi cable bolt, Welded mesh, Domed plate, Nuts, other mining Equipment.
Considerations OF split set rock bolt
01
The anchoring force of split set rock bolt is sensitive to changes in aperture differences. The aperture difference is too large, and the anchor rod cannot be installed in the borehole; The aperture difference is too small to ensure sufficient anchoring force. The diameter of the underground borehole is related to various factors such as the properties of the surrounding rock, the specifications and size of the drill bit, the degree of wear of the drill bit, and the drilling speed. These influencing factors may cause changes in the anchoring force of the anchor rod, leading to unstable anchoring performance.
02
The installation of split set rock bolt is done manually or mechanically, so the anchor bolts cannot be too long, otherwise they cannot be installed, especially in narrow tunnel spaces. In addition, during the installation process, if the rod body is thin or the axis of the rod body is not consistent with the drilling axis, it may cause the rod body to bend and be scrapped.
03
When the service time of the tunnel is long and there is water seepage, the split set rock bolt will be corroded, greatly affecting the anchoring force and even causing anchor rod failure.
IN SHORT
In short, split set rock bolt belong to a low strength and low stiffness support form, and are generally only used in tunnels with good surrounding rock conditions, especially in rock tunnels.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
+8615830050566
zfgongkuang@aliyun.com
