More from Contributed

Coming attractions: Crystalline silica rulemaking

Jun 02, 2015

Coming attractions: Crystalline silica rulemaking

The Mine Safety and Health Administration’s (MSHA) current standards limit exposures to quartz (crystalline silica) in respirable dust. The metal and non-metal mining industry standard is based on the 1973 American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values ...

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MSHA Workplace Examinations a Front Burner Issue for Metal and Non-metal Mines

Jun 01, 2015

MSHA Workplace Examinations a Front Burner Issue for Metal and Non-metal Mines

In late 2014, the Mine Safety and Health Administration (MSHA) published its regulatory agenda for 2015. MSHA will consider how operators perform workplace examinations via a request for information from stakeholders in June 2015 to address fatalities in the metal/non-metal ...

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May 2015

May 01, 2015

May 2015

 Squeeze Play: A Different Take on Dewatering

MSHA’s new RTLB compliance tool may come with a price

May 01, 2015

MSHA’s new RTLB compliance tool may come with a price

During a stakeholder meeting on Feb. 25, 2015, the Mine Safety and Health Administration (MSHA) unveiled a new online web tool to provide information on a mine site’s compliance with the ‘Rules to Live By’ standards.  ‘Rules to Live By’ ...

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A vibrating grizzly feeder not only absorbs the shock of large dump loads, it also improves the efficiency of the primary crusher

May 01, 2015

A vibrating grizzly feeder not only absorbs the shock of large dump loads, it also improves the efficiency of the primary crusher

In the world of aggregate crushing, the word “feeder” can apply to many different devices. There are roller belt feeders, apron feeders, electromagnetic feeders, pan feeders, and others. This article focuses on a feeder type that plays a critical role ...

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In the 1800s, teamsters got an early lesson on the economics of transporting granite during the construction of Vermont’s second state house

May 01, 2015

In the 1800s, teamsters got an early lesson on the economics of transporting granite during the construction of Vermont’s second state house

“The walls of the exterior are of granite, which shews the architectural details to great advantage.” — Zaddock Thompson, 1842, History of Vermont, Part Second, p. 132 Barre Granite, the topic of this series of articles, had achieved recognition as an ...

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Controlling equipment ownership costs

May 01, 2015

Controlling equipment ownership costs

Aggregates operations are all about production. Everything relates to how quickly (and safely) overburden can be stripped, and the material below be recovered and processed. Speed has a big effect on production costs, as does general equipment owning and operating ...

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Bipartisan highway bill would tie federal gas tax to inflation, create transportation commission

Apr 22, 2015

Bipartisan highway bill would tie federal gas tax to inflation, create transportation commission

A bipartisan group of representatives have introduced a long-term bill for funding infrastructure that would tie the gas tax to inflation and create a bipartisan, bicameral Transportation Commission to provide long-term funding of the Highway Trust Fund. The Highway Trust Fund ...

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April 2015

Apr 01, 2015

April 2015

 Spring Safety

Tales from an Old Timer

Apr 01, 2015

Tales from an Old Timer

“Stones that are very large, and which cannot with ease be removed whole , may be blown to pieces with gunpowder. They will be not only more handy for removing, but far better to put into walls. For the blowing ...

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MSHA inspection focus: fatality prevention

Apr 01, 2015

MSHA inspection focus: fatality prevention

The Mine Safety and Health Administration (MSHA) recently announced a fatality prevention initiative in response to increased fatalities within the metal and non-metal sector, which has recorded 37 deaths from October 2013 to January 2015. MSHA announced its fatality prevention ...

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Radial stackers vs. mast stackers: a stronger side of material handling

Apr 01, 2015

Radial stackers vs. mast stackers: a stronger side of material handling

Conveyor systems vary widely in overall quality and efficiency. Consider that operations may obtain conveyors from a variety of sources — from in-house or local fabrication operations, to used equipment outlets, to opting for the latest technologies from major manufacturers. ...

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