| A single longwall path can stretch for two miles, causing everything on the surface directly above it to collapse. |
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| The three main underground mining methods are stoping, room-and-pillar mining, and longwall mining. |
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| In lucid terms, Booth first elaborates the mechanisms and impacts of the hydrogeological response to longwall mining. |
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| There are two main methods of underground mining: room-and-pillar and longwall mining. |
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| In Australia, Nexans has supplied the first and only 11 kV longwall cable in the world. |
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| We do longwall mining, which involves a long, sophisticated steel panel that shears coal off a wall in slices. |
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| First longwall face introduced in the Princess Colliery, Sydney coalfield, Nova Scotia. |
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| In 1976, Old Ben Coal Co., with Federal assistance, began a trial of modern mechanized longwall mining in a new area of their No.24 mine in the Herrin Coal seam. |
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| The monitors were taken from a longwall mining machine near the site of the April 5 explosion, which killed 29 miners. |
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| He earned a degree in Mechanical Engineering and came to Industrial Scientific with experience in designing longwall mining and railroad switching equipment. |
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| The company is also moving a longwall, a type of coal face at an underground mine, at the Twentymile pit in Colorado, which will interrupt production there. |
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| This encourages a frantic stampede to extract every fossil fuel through mountaintop removal, longwall mining, hydraulic fracturing, tar sands and tar shale extraction, and deep ocean and Arctic drilling. |
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| Note: Losses due to limited coal production may exceed the operator's estimated losses due to an anticipated longwall move accounted for in the operator's calculations. |
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| Wear's products include unique designs in longwall face conveyors and flight bars as well as patented quick-change bucket teeth for draglines and excavators. |
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