What are the application scenarios of mining steel strands?

Mining steel strands are very important in mines as deep as a kilometer. They are the first line of defense for life. They can ensure the stability of the mine structure and prevent collapse. They can withstand thousands of tons of tension and resist extreme geological pressure. They are the "underground lifeline" of the modern mining industry. They can directly reduce the incidence of accidents such as collapse and roof falls. Compared with traditional passive support (such as concrete spraying), they can shorten the construction period by 30%; they are also suitable for complex geological conditions such as loose surrounding rocks and high stress areas. They are one of the core technologies for safe mining in modern mines.

Mining Steel Strand

Mining steel strands are made of high-carbon steel or alloy steel with a tensile strength of ≥1860MPa (equivalent to 186 kg vertical tension per square millimeter, about three times that of ordinary steel bars). Through the principle of stress dispersion, their toughness is significantly better than that of traditional steel bars. Together with anchors, trays and other components, they form a complete "anchoring system" that transfers rock loads to deep stable strata to achieve dynamic stress balance. Based on the above characteristics, its main application scenarios include the following aspects:

1. Tunnel Support

In the construction of tunnels in coal mines and metal mines, steel strands are implanted into the rock formation in the form of anchor rods to form a "flexible support network". When the rock formation shows signs of loosening, the prestressing of the steel strands can actively constrain the displacement of the rock mass; measured data from a coal mine showed that after using steel strand support, the deformation of the tunnel was reduced from 15mm per day to less than 2mm, and the risk of collapse was reduced by more than 80%, a decrease of 87%.

2. Roof Reinforcement

In response to the roof settlement problem caused by underground mining, steel strand anchor cables are combined with anchoring agents to construct a high-strength support system: a single anchor cable can withstand a maximum tension of 500 tons, and transfer the roof load to the upper stable rock layer through the "suspension effect"; it is often used in high-risk areas such as fully mechanized mining working faces to effectively control the roof settlement within 10mm.

3. Slope Stability

In open-pit mine slope management, steel strand anchor cables are used as the core reinforcement method: loose accumulation bodies or potential sliding surfaces are fixed by long anchor cables that penetrate 20-30 meters into the rock layer; in a certain iron mine slope project, a combination of steel strands and anti-slide piles was used to increase the slope safety factor from 1.1 to 1.5 (reaching the stability standard).

4. Tunnel Engineering

When subway and water conservancy tunnels pass through fault fracture zones, steel strands play a key role: pre-tensioned steel strands form "surrounding rock stress hoops" to enhance the integrity of the rock mass in advance; during the construction of a subway tunnel, steel strand support increased excavation efficiency by 30% and reduced the risk of water inrush by 90%.

5. Emergency Rescue

Faced with sudden dangers such as mine collapse and rock slide, steel strands have the ability to respond quickly: vehicle-mounted drills can complete deep hole construction within 20 minutes and implant steel strand anchor rods to form temporary support; in a metal mine rescue case, steel strands quickly anchored dangerous rocks, buying a precious rescue time window for trapped personnel.

Mining Steel Strand

With excellent performance, the mining steel strands produced by our factory have been widely used in the above scenarios. The main specifications are 17.8mm, 19.3mm, 20.3mm, 21.8mm and 28.6mm, and customized services are provided. We have been focusing on prestressed steel strands and related products for more than ten years, with professional technical guidance personnel and a rich sales team. In terms of prestressed steel strands, we have many years of export experience and provide professional after-sales service, so many customers continue to return orders. Welcome to purchase mining steel strands and related products, and look forward to contacting you!