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超前支护
在极破碎岩层或不稳定第四系地层中掘进井巷时,为保证掘进作业正常进行并预防工作面发生坍塌,在开挖之前或超前于掘进工作面采取的预先加固措施。
工学
超前支护
释
forepoling
超前支护
采用敷设钢筋、钢管或注浆等方法向隧道及地下工程施工开挖面前方施作的一种稳定开挖面及周边岩体的辅助支护措施。又称预支护或超前预支护。
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proper surface
proper surface of second order
proper system
proper tetrad
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Properties and Actions of Medicinals
properties and evaluation of cement
properties based drug design
properties of ceramic slurry
properties of Chinese medicinals
properties of determinants
properties of flame
properties of material
properties of matter
properties of measuring devices
properties of metals
properties of muscle working
properties of refractories
properties of sizing agents
properties of term
properties of wood-based panels
proper time
proper time interval
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