Tag Archives: University of Queensland

Mining3 makes emulsion breakthrough on alternative explosives project

In November, Mining3 says it achieved a significant milestone with the successful detonation of a world first hydrogen peroxide-based emulsion explosive as part of its alternative explosives project.

Using proprietary formulations, a series of trial blasts confirmed its ability to detonate, and provided early steps into the characterisation of this improved product, Mining3 said. “The new formulation is a major achievement in superseding water-gel/hydrogel formulations and a crucial advancement in product stability and sleep-time,” the company said.

Mining3 and the School of Mechanical and Mining Engineering at the University of Queensland are testing alternative explosive formulations, which eliminate the nitrogen component and replace it with hydrogen peroxide as the main oxidising agent. By removing the nitrogen component of the explosive formulation, it eliminates any NOx fumes generated after blasting, the partners said.

Back in January, Mining3 reported that detonation performance tests, conducted in December 2018 using new materials in the formula – physical sensitisation materials based on glass and polystyrene materials – had delivered improved explosive performance, reliability and product stability.

In its latest report, Mining3 reported on its emulsion developments: “Gums and emulsifiers, are the binding agents in water-gel and emulsions, respectively. Importantly, gums have a low-level organic contamination which leads to hydrogen peroxide degradation and limited current water-gel technology for manufacture-and-immediate-detonation applications.

“With synthetically produced emulsifiers, the material can be inert-to-hydrogen peroxide, lengthening the product stability to a significant period and enabling broader applications in the mining industry.”

Considerable effort has been invested in the pursuit of compatible emulsifiers, Mining3 said, and, with recent successes in detonation trials, it has made the past year of research “worthwhile”.

It continued: “Not only do we have a formulation with advanced oxidiser/fuel intimacy but also considerable advances in stability. Manufacture techniques have also maintained the ambient temperature methodology that gives the hydrogen peroxide-based explosives technology a distinct advantage in production cost.”

Over five days at RUREX, Australia’s only professional independent detonation testing range, upwards of 60 detonation tests were fired. Several other formulations were tested that will advance in the technology pipeline, but it is the confirmation of emulsion tests that was the most immediate success, according to Mining3.

This research has been supported by ACARP from its inception and transfer of this technology to the industry is eagerly anticipated, Mining3 added.

Dr Andrew Kettle, Senior Experimental Scientist and Project Executor, said: “These blasts have confirmed that we are pursuing the right pathway forward. We have invigorated enthusiasm going forward to further characterise the new emulsions in preparation for mine site trials in 2020. We are indebted, of course, to the ongoing support of ACARP and RUREX, and the vision of Mining3.”

Community engagement and automation on the AIMEX agenda

Day one of AIMEX 2019 in Sydney, Australia, was as varied as mining events come. Against an exhibition backdrop that organisers say included more than 500 suppliers, leaders in the industry took to the conference stage to debate some of the industry hottest topics.

The morning sessions started off with discussions on the relationship between the mining sector and local stakeholders, an area of dialogue that becomes more dynamic with every mining, extraction or water use permit issued in Australia.

Stephen Galilee, Chief Executive Officer of the New South Wales (NSW) Minerals Council, was the first speaker to confront the topic and was, rightly, keen to talk up some of the success stories that the state had seen in the recent past.

He said the NSW Minerals Council addressed local community’s priorities through its Upper Hunter Mining Dialogue project, which he believes is one of the world’s best engagement community practices.

A panel, chaired by Austmine CEO Christine Gibbs-Stewart, followed shortly after Galilee and expanded on this line of discussion, with Mark Jacobs, Executive General Manager – Environment & Community, Yancoal Australia, and Ngaire Baker, External Relations Manager of Mach Energy, providing specific examples of how their companies have developed a working relationship with not just the communities surrounding their mines, but also interested parties within the states in which they operate.

Jacobs said the digital age and transparency of reporting has brought miners a lot closer to the communities that surround them than, say, 20 years ago, but he admitted Yancoal Australia and his peers in Australia needed to do more to rebuild the trust that was lost in previous decades. He added that local media played a strong role in this quest.

Baker, meanwhile, recalled several anecdotes about how Mach Energy was building strong community relationships by effectively communicating how the mining company was going about its business of starting up the Mount Pleasant thermal coal mine in the Hunter Valley, explaining what effects this might have on local businesses, as well as inviting them to the operation to gain a better understanding of the mine.

Jacobs and Baker made compelling points, but Anna Littleboy, Programme Leader – Mine Lifecycles, Sustainable Minerals Institute, University of Queensland, made it clear the success of a mine or project was contingent on not only winning over the local community.

“I’m not sure the image of the industry is made or broken at the community level,” she said.

The Adani Carmichael coal project, in the Bowen Basin of Queensland, is a case in point, where local stakeholders have made it clear they would like the thermal coal development to go ahead, but issues on a national and international level have made it increasingly difficult to proceed. This is despite the company recently receiving a significant permit to proceed with construction.

Before the panel discussion ended, the speakers talked about what impact technology may have on local communities, with Gibbs-Stewart questioning what mine site communities could look like in an autonomous future where people no longer operated the machines.

The panellists said these communities could potentially become technology hubs servicing such operations, but Jacobs remarked that local and state governments needed to ensure the infrastructure was in place to allow such a transition to take place.

The next few conference sessions picked up the automation ball and ran with it.

Craig Hurkett, Managing Director, Enterprise Improvement Solutions, explored the challenges and opportunities that came with delivering autonomous vehicle maintenance. His talk touched on just how expensive the current fleet of autonomous machines were to keep running at full tilt.

Robin Burgess-Limerick, Professorial Research Fellow at the University of Queensland, took a different angle in his presentation: ‘Human-systems integration for the safe introduction of automation to mines and quarries’.

He made it clear that automation would change the established safety systems in place at both open-pit and underground mines. He also touched on some accidents that had occurred both above and below ground when autonomous equipment came into contact with either personnel or manned vehicles, but then countered this with details of a past paper he had co-authored on operations at the Northparkes underground mine in New South Wales where the use of autonomous vehicles had seen significant safety improvements as well as a 23% productivity boost compared with previous manual mode.

Factoring this in, he said mining companies and equipment manufacturers needed to ensure that autonomous equipment was designed for the specific operation it was going into and that manual overrides were not used as a workaround to improve productivity – which in the underground US coal mine example he gave resulted in a fatality.

It was then the turn of Dr Joe Cronin, Co-Founder, Australian Droid + Robot, on stage. Cronin, who has helped design autonomous underground systems at both Northparkes and the Syama underground mine (Mali), was positive automation was coming to mining at a pace that would catch many industry participants off guard; meaning they needed to invest to facilitate this change now.

His talk, ‘Using Telepresence technologies for the safe deployment of wireless mesh networks and underground inspection robots in mines’, focused on the improved communications infrastructure in mines and ability for robots and drones to travel into increasingly difficult areas of a mine. This, he said, would see risky tasks currently carried out by people, in the future, taken on by these machines.

Personnel would no longer need to travel underground to carry out sampling in active stopes, with these robust and agile robots able to give them the information they needed through payloads that could carry out 3D scans, take high resolution photos, sense dangerous gases and interpret potential rock falls.

This would not only increase safety underground, it would also allow autonomous operations to run 24/7, according to Cronin, with these robots working unimpeded alongside autonomous equipment.

Reflecting on the proliferation of drones in the open-pit mining space, Cronin estimated that in five years’ time, every underground mine would be using robots or drones to inspect hazardous areas of their mines.

Major miners join Mining3 and SMI for Cave Mining 2040

Mining3 and the University of Queensland’s Sustainable Minerals Institute (SMI) have joined forces with Newcrest Mining, Vale, OZ Minerals, BHP and PT Merdeka Copper Gold to develop the Cave Mining 2040 initiative.

Cave Mining 2040 was originally proposed by Professor Gideon Chitombo (SMI) whose clear understanding of caving needs and his strong engagement with the mining industry was key to its successful formation, according to Mining3.

The international consortium will collaborate on projects aimed at developing new and improved cave mining methods that could help meet future demand for minerals, the company added.

Mining3’s CEO Paul Lever said: “Involving researchers, industry and government will accelerate the required innovations and information to transform cave mining, ensuring its longevity through viable and sustainable methods.”

Cave Mining 2040 aims to develop solutions to reduce lead times and capital investment while also improving viability, safety, cost, production, and societal and environmental acceptance, according to Mining 3.

SMI Director, Professor Neville Plint, said the agreement was important because it brings together two Queensland-based, world-class research organisations. “We are working collaboratively with industry to unlock complex orebodies that occur at depth and require advancements in cave mining technologies,” he said.

“We look forward to developing further partnerships to enhance Queensland’s and Australia’s reputation as a leader in research, technology and innovation.”

After initial consultation with established and future mine owners, mining equipment and technology services, original equipment manufacturers, and a range of other organisations a number of cave mining challenges have been identified.

The first phase of Cave Mining 2040, Horizon 1, is now underway comprising eight research areas – total deposit knowledge, cave engineering, cave establishment, mine design for new and emerging technologies, high stresses and major seismicity, macro-block design and sequencing optimisation, sublevel caving and open automation platform.

Cave Mining 2040 is a cornerstone activity within the Transforming Cave Mining initiative – a partnership between Mining3 and the SMI.

Newcrest looks to University of Queensland to help achieve sustainable mining goals

The University of Queensland (UQ) and leading gold miner Newcrest Mining have agreed a new initiative providing funding for eight new PhD research projects at the institution.

The aim is to develop interconnected and systems-based solutions to transform the sustainability performance of mining operations, UQ said.

The opportunities will be targeted at high-calibre graduates from a range of disciplines including mining, chemical and civil engineering, as well as business and social science areas.

UQ Pro-Vice-Chancellor for Research Partnerships, Professor Mohan Krishnamoorthy (pictured on the left), said: “The alliance with Newcrest represents a strategic opportunity to co-develop the cutting-edge innovation necessary for a sustainable mining future.”

Newcrest Mining Head of Technology and Innovation, and UQ alumnus, Andrew Logan, said research into complex mining challenges was essential to sustainably produce the minerals needed for modern living.

“Newcrest relies on innovation to unlock complex orebodies and academic research, with practical outcomes, provides industry with the necessary understanding for sustainable and safe mineral development,” he said.

The students will be supported for four years by both organisations and work on inter-related projects focused on specifically identified mining challenges.

UQ staff from the Sustainable Minerals Institute and other faculties will work with Newcrest to support the group through additional development activities. As part of the funding arrangements Newcrest will offer competitive top-up scholarships and provide opportunities for on-the-ground experience in Newcrest operations and corporate offices.

This funding announcement is part of a five-year partnership agreement signed between UQ and Newcrest Mining in August.