Conventional mining is characterized as the oldest form of room pillar mining, which consists of a series of operations that involve cutting the coal bed, so it breaks easily when blasted with explosives or high pressure air, and then loading the broken coal.
Other Database Pages Exist for this Phrase:
Mining (Mining refers to the science, technique, and ...)
Bed (Bed refers to a device intended to receive the ...)
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| Surface mining method | ■■■■■■ |
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| Armor-piercing | ■■■■■ |
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| Catalytic cracking | ■■■■ |
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