Theorical Study on the Stability of Waterproof Pillar in Coal Mines[J]. COAL GEOLOGY & EXPLORATION, 1987, 15(2): 37-42.
Citation: Theorical Study on the Stability of Waterproof Pillar in Coal Mines[J]. COAL GEOLOGY & EXPLORATION, 1987, 15(2): 37-42.
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Theorical Study on the Stability of Waterproof Pillar in Coal Mines

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