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(PDF) Backfill mining practice in China coal mines
Backfill mining practice in China coal mines … P um ping subsystem pumps paste slurry from … We also studied and designed a perfect stowing material by using coal gangue and fly ash with …
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Current Status and Future Prospects of Mining Subsidence and Ground Control Technology in … Miu, Xiexing. 2003). The preparation process of paste filling is as follows: first, materials such as coal gangue, fly ash, industrial slag, bank sand are processed into hydrated paste like toothpaste. … fly ash slurry material has better binding …
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Two-liquid type material into the slurry solution A and solution B, solution A of cement, sand and water, B solution of water glass; single liquid-grouting material to cement, fly ash based agent, ingredients are: cement, pulverized coal ash, sand, bentonite (also known as sodium soil) and water.
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This is a PDF file of accepted manuscript versionthe that has been published by the Journal of Mines, Metals and Fuels.. Please cite this article as: Xuan D, Xu J, Zhu W. Backfill mining practice in
The preparation process of paste filling is as follows: first, materials such as coal gangue, fly ash, industrial slag, bank sand are processed into hydrated paste like toothpaste. Then the toothpaste mixture is transported underground and pump filled into the gob.
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