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Drilling

Overcoming problems with hole deviation

A quartzite quarry in Virginia wanted to increase its production and had also been experiencing problems with hole deviation. By Steve Minett

Larger steel drills straighter holes

A specialist, drilling contractor in New England has recently switched to Sandvik’s new, larger Sandvik60 drill steel. By Steve Minett

Longwall roof supports

Caterpillar to supply longwall roof supports to CNX Coal resources mine in Pennsylvania


Hard rock mining advances

Rock Straight System is the first commercial continuous mining and hauling system for underground hard rock applications

Borers: raising the game

Turkka Kulmala explains how a raise borer is defying traditional raise drilling methods and helping a goldmine in Finland surpass the demands of a challenging market

Roof supports to extend longwall

Order for 50 Cat longwall roof supports to extend its Narrabri North longwall from 300 metres to 400 metres

Mining hard rock with longwall efficiency

Low-profile hard rock chain conveyor and hard rock hydraulic roof supports complete the system, which delivers simultaneous cutting, loading and hauling

4000 metre drill programme on high grade targets at gold mine

Alexandria Minerals Corporation announces second-phase drilling at Orenada gold project in Val d'Or, Quebec

Tunnel vision

Martijn-K Mannot-Russell explores the use of mechanised tunnel machines in the mining industry

Updated load sensing valves configurator

Bosch Rexroth has launched a new version of the M4 Configurator for M4 load sensing valves that offers faster design and procurement

Knowing the drill

A roundup of the latest news from the drilling sector. By Jon Lawson

Hanging rocks: scale or fail?

Scaling involves the removal of dangerous, hanging rocks before they fall due to some unplanned action. Maurice Jones reports

Thermal fragmentation approach deployed

Nippon successfully implements its thermal fragmentation mining method in South Africa

Moving forward to reverse (circulation)

Reverse circulation is gaining ground as a preferred technology to collect quality samples in initial exploration, ore body development and in-pit grade control due to its cost efficiency and fast collection of dry, quality samples

Blast without damnation

Maurice Jones looks at how 3D computer-aided design can be used to increase blast efficiency

No contradiction in secure blasting

Mine blasting is no longer a simple activity, even when excavating large masses of solid rock. Maurice Jones reports

Prime drilling power

A new air bearing design means more operating hours for the Sandvik RR321 premium rotary drill bit. Åke R Malm reports

Andy Well open pit gold mining progressing on schedule

Mining of the high-grade stage 1 open pit at Doray Minerals Ltd's Andy Well Gold Project in the northern Murchison region of Western Australia has commenced and is scheduled to take about four months to complete

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