More than 25 laboratories affiliated with quarrying operations have recently participated in the first round of a fine aggregates proficiency testing program to assess the strengths and purities of construction materials. Proficiency Testing Australia co-ordinated the program and analysed the results.
Boral has hosted a Careers Expo for students in Sydney with multinational contractor John Holland, revealing pathways to employment in the construction sector and what students might find once they get there.
A study has found sand and soil in downhill formations can ‘creep’, despite a lack of disturbance, with an almost liquid-like nature. This has posed a raft of questions for those building, working or living near such materials and geographies.
In this third chapter of a seven-part series on the characteristics of effective leadership, IQA member and Hanson Construction Materials manager Sarah Bellman discusses her experiences of building leadership credentials in the quarrying industry.
Bearing failures on mine sites occur most often due to contaminants, such as aggregates, iron ore, coal or any mining material penetrating the seal of the housing. This is aggravated by poor maintenance of the equipment, insufficient or excessive lubrication, and incorrect installation.
On a mine site, water is often used to wash down equipment, leaking through the bearings, turning dust into mud, and hindering performance on production lines.
Sealed spherical roller bearings, as Tony Tormey, BSC’s product manager for industrial bearings explains, are the “last line of defence” where bearings are used in dust-prone applications in mining, such as in conveyor pulleys or conveyors in cement mills.
“Bearings in harsh conditions like mining generally have three barriers, which is the housing, the grease and the seal on the bearing. You can also fill the cavity in the housing with grease, which will act as another barrier,” Tormey said. “But despite all that, water or dust can still penetrate the housing, and that’s where sealed spherical roller bearings provide an extra layer of protection to the bearing.”
Archaeologists from the University of Texas Arlington (UTA) have found obsidian flakes at the bottom of Lake Huron in North America, more than 4000 kilometres away from their quarried source in Oregon.
A British charity has begun fundraising to turn an old quarry and mine site into an “underground cathedral”, the likes of which may have never been seen before.
Sandvik has developed the iDrill automation platform to enable fully autonomous blasthole drilling for the Leopard DI650i down-the-hole drill rig.
The NSW Resources Regulator has introduced a section to its online portal for mining workers to apply for examinations, certificates of competence and practising certificates.
Terex Washing Systems (TWS) will host a ‘Virtual Live Showcase of their End to End Washing Solution’ in County Cork, Ireland, on Tuesday 22 June, 2021.