GB/T 39963-2021
ActiveTechnical specification on C80~C100 concrete shaft lining applied in vertical freezing shaft
立井冻结法凿井井壁应用C80～C100混凝土技术规程
Application Summary AI generated
This standard specifies the technical requirements for using high-strength C80 to C100 concrete in vertical shaft linings constructed via the freezing method. It is applied in deep mining operations, particularly in coal and mineral extraction, where freezing shafts are used to stabilize water-bearing ground during excavation. The standard ensures structural integrity and durability of the concrete lining under extreme cold and high-pressure conditions.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.