4. Mining or in situ disintegration of hard material
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  6. Stabilizing underground structure
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Safety wall cutting through method employed in long wall mining

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

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Shield system for coal mining

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

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Shield tunneling machine and method

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

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Shield tunneling method and machine therefor

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

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Shortwall mining of trona

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

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Single-entry mining development system

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

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Stress control mining method and apparatus

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