4. Mining or in situ disintegration of hard material
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Life protector enclosure for mines

Mining or in situ disintegration of hard material – Processes – Forming blocks
Patent

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Longwall mining apparatus for working thick seams

Mining or in situ disintegration of hard material – Processes – With material-handling
Patent

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Longwall mining of thick underground mineral seams

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Longwall mining of trona with prefracturing to prevent slabbing

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Longwall mining system

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Longwall mining with blasting

Mining or in situ disintegration of hard material – Processes – Explosive
Reexamination Certificate

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Longwall mining with chain pillar recovery

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Longwall trench mining system

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Low elevation coal processing plant

Mining or in situ disintegration of hard material – Processes
Reexamination Certificate

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