Tag Archives: rock reinforcement

Epiroc reinforces order book with Norilsk Nickel contract

Epiroc has won an order from Norilsk Nickel for underground mining equipment that, the OEM says, will strengthen safety at three of its mines in Russia while ensuring highly efficient mine development.

Norilsk Nickel, one of the world’s largest producers of nickel, palladium, platinum and copper, has been investing in automation and digitalisation for the past several years. This has seen it introduce advanced digital technology in mine engineering, as well as in planning and operational control of mining activities, through its Technology Breakthrough program.

As part of this order, the miner has secured Epiroc’s Boltec M (pictured with with pumpable resin option) and Cabletec M rigs for use in the Oktyabrskiy, Mayak and Komsomolskiy mines to reinforce the underground rock in the safest and most productive manner, Epiroc says.

Quality and productivity are key features of these machines, Epiroc says. “For example, several of the Boltec machines will be equipped with the new automated pumpable resin system, a key component in Epiroc’s automated bolting development. The pumpable resin system, when combined with self-drilling anchors, is particularly effective in difficult and unstable ground conditions.”

One of the more difficult rock reinforcement tasks in underground mining and tunnelling operations is how to install long-term rock bolts in poor rock conditions, Epiroc says. As a result of this difficulty, rock bolting traditionally has often been the bottleneck within the drill and blast cycle.

“To resolve this, Epiroc in 2019, launched a pumpable resin system for underground rock bolting, allowing for a faster, more reliable and cost-effective bolting alternative for long-term rock reinforcement in difficult ground conditions,” the company said.

The Norilsk Nickel order exceeds SEK100 million ($11 million) in value and was booked in the September quarter of 2020. The equipment will be delivered from the company’s Sweden operations in the December quarter, Epiroc said.

“Norilsk Nickel has been an Epiroc customer for many years,” Helena Hedblom, Epiroc’s President and CEO, said. “We are proud to play a key role as this forward-looking mining company now takes the next step in its commitment to safety and productivity with our latest technology.”

Epiroc pumps up rock reinforcement offering

Epiroc, together with LKAB, has developed a new solution for installing long-term rock bolts in poor rock conditions.

The pumpable resin system for underground rock bolting, designed for the mechanised bolting machines Boltec M and Boltec E models, is a result of the mining OEM and mining company’s collaboration within the EU-led Sustainable Intelligent Mining Systems (SIMS) project.

Epiroc says: “One of the more difficult rock reinforcement tasks in underground mining and tunnelling operations is how to install long-term rock bolts in poor rock conditions. Rock bolting, as a result, is often the bottleneck within the drill and blast cycle, leading to difficulties to predict work task scheduling.”

Blocky or friable ground often leaves drilled bolt holes blocked or partially blocked. This slows down, or in the worst case, prevents the introduction of bonding agents such as cement grout or resin cartridges into the bolt hole.

“The Epiroc and LKAB solution will allow a faster, more reliable and cost effective bolting alternative for long term rock reinforcement in difficult ground conditions,” Epiroc said.

Peter Bray, Global Product Manager, Epiroc, said: “An important factor to achieve a workable rock reinforcement solution is to have a system where the bolt design, bonding agent and bolting rig all work together to provide a robust and reliable bolt installation. To this end, Epiroc has worked hand in hand with a leading bolt and chemical supplier to create a bolting system that addressed the issues faced with long-term bolting in poor ground conditions.”

The result of this work is an integrated pumpable two-component resin system that can be used with a Self-Drilling Anchor style bolt in tougher ground conditions or, alternately, with a two-step hollow bolt in more moderate ground conditions.

“Having the ability to choose a long-term rock bolt that suits the ground conditions means that customers are able to achieve an optimal rock reinforcement regime in terms of function and budget,” concluded Bray.

Quaker Chemical highlights dust suppression, ground control and fluid expertise

Quaker Chemical Corp says its package of dust suppressants, ground control agents and longwall fluids address several of the mining industry’s ongoing needs.

High levels of respirable dust and quartz can cause visibility and other health and safety issues to mine workers, which is where its DUSTGRIP® dust suppressants come in.

These suppressants have been formulated, the company says, to:

  • Reduce the generation of airborne particulate matter from mines, roads, stockpiles, rail hauls, construction sites, quarries and other areas where air-born dust is a problem;
  • Increase site safety for workers by reducing levels of airborne dust and quartz, and;
  • Have a cumulative effect so they are longer lasting with lower maintenance cost when compared with water alone.

On top of this, it has its MINETECH™ Ground Control Agents within its portfolio. Designed to consolidate and stabilise unstable ground, as well as seal against water ingress, these ground control agents provide good penetration into small cracks and fissures, high adhesive strength and “Outstanding mechanical properties and flexibility to be an effective ground consolidation and stabilisation tool”, it says.

Fluid instability, sticky soaps, bacteria and corrosion can all be a risk to mine equipment and workers, the company said. “QUINTOLUBRIC® 818-02 has been developed as a 100% synthetic true solution that triples filter life through superior fluid dynamics and improved system cleanliness; reduces bacteria, keeping systems free of corrosion and plugged filters, and; is compatible with all commonly used longwall fluids for easy conversion.”