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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。
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forepoling
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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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Main Currents in Sociological Thought
Main-Danube Canal
main device
main diagonal
main diagonal of a square matrix
main diagonal sum
Main Directorate for Literature and Publishing
main distribution channels of books
Mai-Ndombe Lake
main drift chamber
Maine event
main effect
main effect of factor
Maine Henry
main electrical connection diagram
main electrical power system
main entry
main equipment protection
main equipments of reactor system
Main Essentials of True Gold Elixir
Maine State
main exciter
main face
main fishing grounds in the world
main flow area and expanding main flow area of cleanroom
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
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