In 2021, international iron ore prices will rise sharply. This year, the price of iron ore fluctuated around 130 US dollars / ton, and the performance was relatively stable.

However, under the stimulation of various policies, the international iron ore price may rise again.

According to the iron ore output in 2021, the total iron ore output of the world's top 10 iron ore companies is 1.245 billion tons.

In the mining of iron ore, mining support products are very important, which can protect the safety of workers in underground mine operations. 39mm split set rock bolt is an active support product.

Working principle of split set rock bolt:

Install the split set rock bolt in a borehole smaller than the diameter of the pipe. At this time, three forces will be applied to the surrounding rock, one is the radial pressure on the hole wall within the entire length of the pipe seam bolt, One is the friction force, which is used to prevent the surrounding rock from sliding down, and the other is the supporting force of the split set rock bolt plate. These three forces make the surrounding rock more stable.

How to use split set rock bolt?

1. Determine the position of the bolt hole according to the design requirements, and drill the hole with a drilling rig;

2. Use a blower to blow out the rock powder in the hole;

3. Install the anchor plate on the rod body, and drive the anchor rod into the hole with a percussion drill.

Recommended Calculation Method for Borehole Diameter of split set rock bolt:

In the rock formation: drilling diameter = (0.9-0.95) × bolt diameter;

Anchor drilling depth: anchor length + 100mm drilling deflection rate < 1%;

In the coal seam: drilling diameter = (0.9-1) × bolt diameter;