NB/T 11454-2023 Specification for risk management of freezing sinking method
NB/T 11454-2023 Specification for risk management of freezing sinking method
Basic Information
Scope
This document specifies the risk management requirements for the design of the wellbore, the design of the freezing scheme, the design of the freezing system and the power supply system, the construction of the freezing drilling project, the installation of the refrigeration station, the freezing process, the construction of the shaft excavation and masonry project, and the construction of the grouting project between the wellbore walls, as well as the requirements for special measures to control the risks of freezing well drilling.
This document is applicable to the risk management of freezing well drilling projects in mining engineering design, construction, and management. The risk management requirements for freezing well drilling in other projects shall be implemented with reference to this document.