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first supporting
释义
first supporting
Encyclopedia
工学
巷道支护
释
first supporting
一次支护
在软岩(土)层、较破碎的不稳定岩层或高地应力地层中掘进巷道与硐室,为保障施工安全并维护井巷的长期稳定,开挖后初次进行的支护。又称初次支护。
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