Mining in mud at El Teniente

El Teniente mine chile

RCT helped El Teniente, the world’s largest underground copper mine, safely reach dangerous places

RCT has helped the world’s largest underground copper mine, El Teniente, successfully and safely mine in mud, in what is believed to be a world-first mining method in these conditions.

The feat was facilitated by the company’s specialized department, RCT Custom. The bespoke team helped deliver a state-of-the-art ControlMaster Automation solution, allowing the copper-rich mud to be accessed with minimal risk.

The Codelco-owned site is prone to mud rush caused by ice melting on The Andes mountain range, a hazard that had closed the exploration area for months on end. This combined with the company’s plan to expand operations to the seventh and eighth levels made it crucial to find a solution that would allow them to mine mud ore safely.

The goal was to use technology to reach a somewhat hazardous reserve, which has a potential of about 2 million tons.

Codelco presented RCT with the challenge of retrofitting RCT’s ControlMaster Teleremote and Guidance Automation systems previously installed on a surface dozer, loader and truck at its Andina mine. RCT had to upgrade the equipment to fit onto the site’s Sandvik LH517 loaders operating in the El Teniente underground mine. Operators were relocated to a surface control room connected to the loaders over the mine’s communication network.

“It was quite a challenging engineering project which required the combination of proven RCT solutions with a mine’s network, but RCT thrives in these situations,” said Phil Goode, RCT’s senior business development officer. “Projects like this are the reason we have our specialized division, RCT Custom.”

While the existing solution would suit all mine conditions and achieve the outcome desired by the client as is, a factory refurbishment and upgrade was essential to ensure the retrofit went to plan.

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“This project highlights just how versatile RCT’s Automation solutions are. It was a significant bespoke engineering project that required the existing solutions to be fully factory tested before being installed at the mine and integrated into El Teniente’s existing network,” Goode said.

Installation and commissioning were undertaken by RCT with its channel partner, Power Train Technologies (PTT). This required the system to integrate into Codelco’s existing digital Wi-Fi network, which required the collaboration between the client’s mining, maintenance, engineering and innovation teams.

“The integration of refurbished equipment, installed on working production loaders into the existing mine network posed unique challenges, all of which were overcome by professional collaboration between, Codelco, RCT and PTT,” Goode said.

Rafael Guzmán, El Teniente’s chief of mine automation, explained the system utilizes the standard wireless network, configured and managed with its own resources, which is used in various systems of underground work.

“The important thing for the site was to have a robust and reliable communications system, which in our case translates into one of the largest networks of this type in mining,” added Norma Vargas, a senior engineer with the corporate department of automation.

RCT’s Automation solutions ensure the loader travels along the optimum path and at a speed that will deliver consistent cycle times across all drivers, during every shift. As well as tramming faster, the loader will avoid walls and obstacles significantly reducing machine damage and unplanned downtime.


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In addition, the Guidance Automation technology removes disparity between drivers and the time it takes to complete the checklist during shift change has also decreased. Guidance Automation technology will prevent damage to the loaders while allowing them to be driven in third gear, which results in more buckets each shift.

“Productivity and safety can go hand-in-hand. We have a precious treasure waiting to be extracted from the muddy water, and we are now on the right path, thanks to RCT’s Automation,” said El Teniente mine’s innovation and development project manager, Pablo Gándara.

There is a goal of producing 600 tons per day in a six-month period with plans to implement another loader with RCT’s Guidance Automation to reach 2,500 tons per day.

“The mine will be able to recover reserves that were once abandoned after being deemed too dangerous to access by our operators who would be exposed to mud water pumping through the area,” said Leonardo Barría, head of Diablo Regimiento.

El Teniente said it will look at replicating this technology to other areas of the mine prone to mud and humidity if the technology performs.

“This was a significant, innovative engineering project for RCT, and we are proud to have been part of it,” Goode said.

Check out this remote control dozer by RCT: