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Mining Operations & Strategies

The bucketwheel excavators (BWEs) often used in surface mining of soft coal deposits are gigantic machines. With great size comes great punishment. BWEs must absorb a tremendous amount of impact...

Suppliers Report

For an industry that mostly measures its success in terms of the volume of rock blasted, hauled, processed into product and shipped, a growing dependency on an often-arcane tool such as software is...
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Compressor Runs Safely in Underground Mining Applications


British Columbia-based VMAC said its Raptair diesel-driven, stand-alone air compressor is now available in a U.S. Mining Safety and Health Administration approved version. The primary modification to enable approval was a change to the engine; the MSHA-approved version uses a Kubota engine that runs at a slower speed than the diesel offered in the Raptair60. The approved engine enables the compressor to provide more than 52 cfm and lower RPM also make the system quieter than the 60-cfm version. Although there is a decrease in cfm, the company claims the MSHA-approved Raptair50 is a high-performance unit that can be truck- or skid-mounted, and provides enough power to run most common air tools used in mining operations. 

www.vmacair.com 

From the Editor

This month, E&MJ offers an in-depth report on Newmont Mining Corp. When gold prices started to decline, the company began to optimize operations and sell assets. Lowering operating costs allowed it to invest in operations during the downturn and now they are reaping the rewards.
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Exploration Roundup

Aston Bay Holdings has initiated at $C4 million field program at the Storm copper project on Somerset Island, Nunavut, Canada, where BHP Billiton can earn a 75% interest in the project by spending a...

This Month in Coal Mining

Contura Energy completed the previously announced acquisition of several core assets from Alpha Natural Resources (ANR), which was a key step for Alpha to emerge from Chapter 11 bankruptcy. Contura...