Left-handed rock bolts for mines, also known as left-handed bolts, are mainly used for mine roadway and underground engineering surrounding rock support. Generally speaking, the left-handed rock bolt can help support the stability of the mine roadway and the surrounding rock of the underground project. Its structural features: the entire length of the rod body has rolled continuous threads, and the total length is equal in strength; the prestressed gasket and ball are provided at the imprisoned end head nut. It is widely used in all kinds of roadway support in coal mine, railway, hydropower and other projects.

1. How to use the left-handed rock bolt

Determine the location of the bolt holes according to the design requirements, drill holes with drilling tools, and blow out the rock content in the holes with compressed air. Put the anchoring agent into the bottom of the hole, and use the anchor rod to start stirring. After the mixing is completed, remove the mixing machine. After the waiting time is reached, remove the mixing connector, install the anchor disk, spherical washer, friction washer, and tighten the nut with a special wrench.

2. Advantages of left-handed rock bolt

Rock bolt has high strength, reasonable structure and large preload. It can automatically adjust the direction of the force and increase the binding force on the surrounding rock. It can realize mechanized rapid installation. It can be end anchor, lengthened anchor and full anchor, mainly used for high and low pressure. High-strength support for large-deformation roadways in mines. The strength of the threaded section is greater than the strength of the rod body. The threaded section has good bending and shear resistance, high strength, reasonable structure, and large pretension. It is a new type of anchor for high-strength support.

The above is the relevant knowledges of left-handed rock bolts for mining. ZXSteelGroup has more than 20 years of development and has rich experiences in the production and sales of left-handed rock bolts. If you have any needs in this regard, please contact us!

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