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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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New Cat Hammers Retain Popular Features


Caterpillar has added three models to the E Series Hammer line—H140Es, H160Es and H180Es—for use on medium and large excavators ranging from its 324E to the 374D L.

The energy classes of the H140Es, H160Es and H18Es are 6,000 ft-lb (8,135 J), 8,500 ft-lb (11,525 J) and 12,000 ft-lb (16,270 J), respectively. The E Series Hammers build on the proven D Series Hammers, which the new hammers replace. E Series Hammers feature a new symmetrical housing design, which allows rotating the housing 180° to compensate for wear. The lower portion incorporates rock edges that add protection to the housing and enable quick positioning of boulders. An optional wear package is available to improve hammer durability in severe applications. Features carried over from the D Series include automatic shut-off, which instantly stops the hammer when the tool breaks through material. The system increases hammer reliability and durability by eliminating high internal stresses created by blank firing. Another feature continued in each E Series Hammer is the external pressure control valve, which reduces service time when an adjustment is necessary. The E Series Hammers are designed to be field serviceable with common hand tools. Sound suppression is standard for environmental protection and operator comfort. The new hammers’ settings are preprogrammed in Cat excavator tool control systems for easy set up. Oil flow and pressure are fully adjustable in the tool control program, and actual hammer working hours can be recorded for routine maintenance purposes.
www.cat.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...