... backstoping 上向梯段回采 backwall injection 井壁背后灌浆 backweight 平衡锤 ...
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backwall l injection 井壁背后灌浆
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In this paper the authors approach the application of drilling mud to face pre-injection, backwall infilling injcetion, roof fall space infilling injection and split zone infilling injcetion.
本文探讨了泥浆在工作面预注浆、壁后充填注浆、冒空区充填注浆和离层带充填注浆中的应用。
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