Modern V-Cut Design

The V-Cut is a method for blasting underground headings that has become increasingly popular, especially with underground aggregate producers due to its effectiveness in reducing the cost per ton of rock produced and reduction of fines. In general, a V-Cut will utilize fewer holes than a burn cut by removing the overloaded burn holes and replacing them with angled holes that break to the natural free face. These angled holes are typically designed to have an appropriate burden; however, do incur a slightly larger cost than normal production holes due to setup time and drill accuracy and reduced depth of pull.

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Is the Ultra-class Truck Dream Dead?

Two mining engineers review lessons from a manufacturing ‘leap of faith’ and see different futures for the world’s biggest haulers

Ultra-class trucks have now been around for almost two decades, a timeframe ample for meaningful reflection. Beyond the data, there are now plenty of case studies and stories to consider that can make the case both for and against their deployment. A couple of mining engineering professors from Canada said after glancing back it becomes apparent the ultra-class hauler does have its place, which is also to say that there are mines where it definitely doesn’t belong. A handful of variables determine which is the case for a particular mine. Where they diverge is if there is now a trend at play reflecting this reality and what that trend looks like.

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Technology Alone Won’t Keep Workers Safe

Smart design, adequate training and an operator’s fitness for the job are critical to safety success

Mining companies have taken great strides to improve operator safety in recent years, and collision awareness systems will likely further this trend as mine sites globally strive to achieve a zero-incident workplace. But while new technologies can help this improvement effort, technology alone cannot be a mine’s only line of defense in the goal to avoid vehicle collisions; sufficient training and operators that are fit for the job are also required to achieve total mine site safety.

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Small But Mighty: Pneumatic Actuator Sizing and Selection Simplified

In mines and mills, installation space is often at a premium for pneumatic actuators used in valve automation

Although space has been a long-standing hurdle in the actuator industry, innovation around this restriction didn’t take place until recently. In fact, up until the late 2000s, no fundamental improvements or disruptions to pneumatic actuator designs occurred. The old generation of valve actuators typically relied on internal springs. In this design, when the actuator moves the flow control element away from its starting position (open or closed), it compresses the internal spring and then uses the energy stored in the spring to move the control element back toward its starting position.

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