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Blasted rock at Boral Deer Park Quarry. Note finer material in worked face on left compared with coarser “crust” on right.

Fragmentation analysis opens way for new plant design

A quarry plant replacement project in Melbourne’s western suburbs has cleared its first hurdle thanks to a proprietary fragmentation analysis software program developed by a blasting specialist. Graham Gordon reports. Read more »
The original Barmac crusher on permanent display at the entrance to the Kiwi Point Quarry, Ngauranga Gorge, Wellington. (Source: Louise Foord, History New Zealand)

Crushing stone with stone: Bryan Bartley, Jim Macdonald and the Barmac crusher

The Barmac crusher – the first of the industry’s vertical shaft impact crushers – is today a mainstay of the quarrying industry. But who were the extraordinary men behind the Barmac? Louise Foord and Neil Clayton pay tribute to two of the New Zealand quarrying industry’s legends, including Bryan Bartley, who passed away earlier this year. Read more »
The fully operational model crushes actual quarried stone sourced from a local site. Image credit: The Advocate.

Working model quarry delights young and old

A working model of a quarry will be exhibited next month, providing the general public with an accessible way to understand the extractive industries. Read more »
The miners’ program includes on-site work with Metso’s mobile plant and DNA automation system.

Future miners train with automated tracked mobiles

The world’s first educational, mobile and fully automated Metso plant for training future miners and crushing contractors can be found in Taivalkoski, northeast Finland. This unique learning environment is made up of three Lokotracks, a Metso DNA automation system with an operator training simulator and Bruno process simulation. Read more »
Hy-Tec’s maintenance team at Yarrabee Road Quarry.

Case Studies
A better way to loosen the nut: Liner changes made simple

Changing liners on a static crusher has in the past been a hazardous manual task for quarry workers. It was therefore a shock for participatory ergonomics trainer Kylie Newton when she observed that some workers still perform physically demanding tasks that can result in serious, sometimes career-ending injuries. Fortunately, there was a viable solution … Read more »
Conveyor chutes between plants at Hanson’s Wolffdene quarry operation.

Improving your quarry operations from the inside out

As part of its Professional Development Program (PDP), the Institute of Quarrying Australia has developed a series of dedicated quality plant training days for quarry operators, managers, foremen, plant operators, sales staff and all who need to know more about quarry plant and equipment. Read more »
In case you can't get enough of a real quarry, here's a simulator game.

Virtual quarrying becomes child’s play

If you can’t get enough of working in a real quarry, then when you head home, you can now get on your Windows computer and play Stone Quarry Simulator. Read more »
Space at Hillhead 2012 is now at a premium.

Hillhead 2012 filling fast

The world’s top quarrying exhibition is shaping up for a massive year, with 385 exhibitors having committed to Hillhead 2012. Read more »
Figure 1. John Floyd’s graph of suggested delay intervals between rows.  (In: Floyd J. Blast Dynamics: presentation. 2005.)

Case Studies
A Few Timing Concepts

Timing has long been considered the “dark art” of the blasting process, even with the advent of computer timing and blast design packages. Brent Buffham explains why timing in some cases is still a misunderstood aspect of the blasting process and how to address timing gaps. Read more »
Associate Associate Professor Bill Bamford will head Coffey Information's new rock testing analysis service.

Rock testing giant to be based in Melbourne

Engineering consultancy firm Coffey Information has established a world-leading rock testing laboratory in Melbourne and appointed Australian “rock guru” Associate Associate Professor Bill Bamford to head its new rock testing analysis service.

Read more »
Millstones have been used for grinding grain since Roman times

M is for millstone

Continuing his passage through the A–Z of quarrying terms, Bill Langer charts the story of the millstone quarry on both sides of the Atlantic. Read more »


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