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Of all the evolutions in coal mining over the last few centuries, none is more significant than technology. In the early days, coal was mined by hand, with individuals wielding a pick and shovel. By the Industrial Revolution, coal-cutting machines and steam shovels designed for coal mines were common, making the work more efficient. And throughout the 20th century, improvements in equipment design led to dramatic increases in productivity and safety.

Today, new advances in technology are driving even higher levels of performance and material management—especially in open-pit, or surface, coal mines, where miners are focused on removing the most material as quickly and safely as possible.

As dragline operators work to extract coal, for example, they can simply glance at an in-cab display that shows the position of the bucket and tub relative to the design plan, as well as whether each dig point is above or below plan. That helps them move material accurately and...