Greenhills Archives - International Mining

As part of its work towards eliminating occupational disease, Teck has completed a pilot project using an innovative combination of on-the-ground data and video technology to help better understand potentially harmful dust exposures at a task level.

The Nanozen pilot project, completed in 2020, was devised to understand task level exposures so the company could “laser focus” critical control strategies to reduce employee exposures.

As the company says, occupational exposures that can give rise to occupational disease represent the single most significant health and safety risk in the mining industry globally.

The large-scale pilot project it carried out, which included its Greenhills, Fording River, and Highland Valley Copper Operations, was funded by Teck’s Ideas at Work program. The pilot program leveraged the power of advanced analytics to collect real-time exposure data for job roles including pit crews, mechanics and equipment operators.

Exposure to dust at mine sites is a potential health and safety hazard, leading to respiratory diseases if proper precautions are not taken, Teck says. For years it has been industry standard to rely on daily sampling methods, averaged over the length of a shift, to determine dust exposure. These sampling methods provide one value indicating an employee’s overall dust exposure for a shift.

By making use of Nanozen’s real-time monitoring technology, Teck says it has been able to greatly improve the collection of information about dust levels during a work shift. Instead of a single value for an entire shift, it can now monitor live, accurate information on the concentration of dust exposures.

*An overview of the instruments and tools deployed for the Nanozen pilot project*

“This has enabled us to better understand how and when these exposures occur, and to target controls that reduce exposures from higher-risk activities,” the company said.

In 2020, the Nanozen pilot project was initiated at sites to deploy this technology into a wide range of roles including field and shop mechanics, pit utility and cable crews, bulldozer and grinding operators, and laboratory workers involved in sample processing. Teck’s Occupational Health and Hygiene team leveraged advanced analytics, diving deep into the data to find meaningful results and actionable changes, it said. This increased volume of research data, the company says, has helped it pinpoint the specific activities and times where dust exposures occur and prioritise approaches to mitigate them.

Dan Sarkany, Lead, Occupational Hygiene at Teck Coal, said: “Applying analytics to real-time particulate monitoring helps us determine exactly which activities lead to high dust exposures, allowing us to recommend and implement targeted controls to improve employee health and safety.”

This pilot project coupled Nanozen real-time dust monitoring technology with on-site video recordings and video analysts trained to recognise job activities. The footage collected maintained confidentiality and privacy by blurring faces and skin tone, and no audio was recorded. Teck said it had the full support of its workforce to undertake this work.

Corrine Balcaen, Director, Occupational Health & Hygiene, said: “This project represents a leading health and safety initiative in the mining industry and other industries with dust exposures.”

Real-time dust monitoring, and the targeted controls developed as a result of the learnings, will continue to be implemented throughout its operations going forward, the company said.

“This technology serves a key role in improving exposure controls and working towards Teck’s goal of eliminating occupational disease,” it added.

In 2019, Teck employed Nanozen’s real-time dust monitoring technology at Greenhills as part of a study looking to gain detailed, real-time data on dust exposure levels throughout a typical haul truck driver shift.

This is an edited version of the story that first appeared on Teck’s website, here.

As part of its commitment to improving water quality in British Columbia’s Elk Valley region, a number of research projects are underway to prevent nitrate from entering the environment and protect water quality in the region.

One source of nitrates is from explosives that interact with water during the blasting process, Teck said. “When this occurs nitrates can leach out of blastholes and enter the natural environment. To stop this from occurring plastic liners are used to prevent explosive materials from coming into contact with water,” the company said.

However, in order to use plastic liners, blast holes have historically needed to be dewatered so that the liner can reach the bottom of the hole and stay there, Teck said. “For blastholes that refill with water, a new approach was required.”

To tackle this problem, Teck undertook a research project to determine how plastic liners could be used in blastholes that naturally refill with water (often called dynamic blastholes). The research project was led by Teck with support from suppliers Maxam, Teck’s explosives provider, and Friesen Plastics, Teck’s liner supplier. Together, various combinations of procedures, liner types/packaging and explosive bulk truck modifications were trialed until a new system was developed.

Teck explained: “The emulsion in a liner system involves using the charging hose on the explosives truck to place the plastic liner in the bottom of a dynamic blasthole. The hole is then loaded with water resistant explosive from the bottom up, both filling the liner and keeping it in place. Once complete, the end result is a lined blasthole with the explosives protected from the water.”

In order for the plastic liner to be effectively placed down the blasthole, a hydraulic arm and funnel were added to the explosive bulk truck hose and the traditional borehole plastic liners had to be compressed into an accordion shape, according to Teck. The hydraulic arm allows for the hose to be placed directly over the blasthole and the funnel removes the wrinkles from the compressed plastic liner as it unfolds and is pushed to the bottom of the hole. “This ensures consistent lining of every blasthole while meeting our needs of durability and functionality,” the company said.

A common problem identified during early tests was the plastic liner being pulled back up the blasthole as the hose was withdrawn.

To address this, a system was developed that applies mineral oil to the bulk truck hose which acts as a lubricant allowing the hose to be withdrawn while keeping the plastic liner and blast material in the hole, Teck said.

“This process has now been successfully field tested on over 400 holes and has proven to be a safe and effective design,” the company said.

This new process is currently being piloted at Teck’s Fording River and Greenhills operations, but the plan is to implement across all of Teck’s steelmaking coal operations in 2019, the company said.

”As a result, every blasthole in the Elk Valley that is operationally accessible will contain a liner that protects both the explosive product and the environment. This will significantly reduce nitrate at source and help to protect water quality.”

Teck leverages Nanozen tech to improve occupational health at mine sites

Teck trialling new blasting process to protect water quality in BC, Canada