Mineral operators applying to extend or establish a new quarry will typically emphasise the number of jobs they will preserve or create, hoping to influence councillors on planning committees.
THE livelihoods of East Devon quarry employees will be at risk if proposals for a 100-acre quarry on the outskirts of Ottery St Mary do not go ahead.
Officials from Aggregate Industries, which runs quarries at Blackhill on Woodbury Common, and Venn Ottery, have confirmed that this is the reality if they cannot proceed with their plans to quarry Straitgate Farm near Daisymount roundabout.
It is not clear exactly how many jobs could be affected but it is thought to be less than 10.
The
reality was indeed less than 10. In the
supporting statement for its planning application to quarry Straitgate Farm, Aggregate Industries – now Holcim UK – confirmed:
3.5.8 The number of full time employees at the site would be three.
It’s a small number, although still exaggerated because:
3.5.2 Mineral working would be carried out on a campaign basis, comprising two or three working periods or campaigns, with each campaign lasting
five to seven weeks.
Nevertheless, the number of jobs in the UK quarrying industry has been declining for decades. Back in 2012
we posted:
Even over the last 10 years there has been a dramatic fall in employee numbers in sand and gravel, with the UK Minerals Yearbook reporting over 8000 employees in 2001, but under 3000 in 2010. The HSE says the "industry has difficulty attracting and recruiting staff" and "anecdotal evidence suggests an ageing workforce".
It’s not clear where the sand and gravel employment numbers have gone in recent years, although they are unlikely to have increased, judging by
these ONS numbers.
In 2019, the ONS estimated that
57% of jobs in the "quarry workers and related operatives" sector were at risk from automation.
We
first posted about autonomous vehicles in 2018, when they were being trialled at a Swedish quarry.
HOLCIM UK have taken part in a trial utilizing AI-powered autonomous technology to operate an excavator. The trial, which took place at the company’s Lee Moor sand and gravel quarry [sic], near Plymouth, Devon, involved a 23-tonne Develon crawler excavator fitted with autonomous technology from Swiss start-up Gravis Robotics.
Once set-up and testing had taken place, the machine was tasked with feeding the hopper of a screener with sand and gravel at target performance rate of 100 cycles per hour. During two days of testing the machine was able to average 133 cycles per hour, shifting 1,500 tonnes of material daily with 99% accuracy and minimal spillage.
Paul Mitchinson, head of mobile plant at Holcim UK, was quoted as saying:
"We were excited to be able to take part in the trial at one of our quarries and see how autonomous technology could work and be successfully integrated into day-to-day operations.
"The introduction of this type of technology in our industry could lead to greater productivity through increased output and consistency, improved safety on site, and improved sustainability through optimizing the performance of large plant equipment.
"As a company, we are continuously seeking to innovate and to improve our ways of working in order to enhance productivity. This includes exploring how artificial intelligence (AI) can support what we do to help us be more efficient."
For greater productivity and efficiency – read fewer jobs.
Holcim has had its sights on autonomous technology for some time.
HDX and Gravis Robotics are collaborating to implement jointly developed autonomous technology using Develon’s equipment across Holcim’s operations, with a particular focus on quarry environments including:
* Truck loading of blasted rock for efficient material transport
* Feeding hoppers of mobile crushers and screeners with extracted materials
* Confined material handling at asphalt and aggregate plants
* Stockyard management, optimizing material flow and storage.
Holcim’s quarrying and processing sites combined with their operational expertise provides the consortium with a global platform that can be used to enable the integration of autonomous heavy construction equipment.
Through the adoption of autonomous machinery, Holcim want to realize increased productivity through increased output and consistency, increased safety by reducing the number of people on site…
Quarry operatives at Holcim UK, and planning committees, be warned.