DOI: 10.11799/ce202505001
Analysis and optimization of factors influencing the frozen depth of shaft lining in deep water-rich weakly cemented surrounding rock
ZHOU Aiping
TAN Jie
QIAO Wenjun
WANG Peng
DONG Junliang
Abstract：In China's western coal mines,shafts need pass through deep,water-rich,weakly cemented surrounding rock formations from Cretaceous and Jurassic periods.Thus,artificial ground freezing methods are applied during large-diameter shafts construction.Determining the appropriate frozen depth is crucial for safe and successful shaft lining construction.In the case of deep shaft freezing,the cost of freezing significantly increases with depth.To rationally determine the shaft lining's frozen depth,the factors influencing frozen depth are analyzed,and a comprehensive assessment based on two main factors:the location and dimensions of shaft-related chambers and the geological conditions of the shaft(including engineering and hydrogeological conditions)are proposed.By combining specific analysis of shaft-related chambers,rock distribution patterns,and water content in the main and auxiliary shafts of a particular mine,along with insights from neighboring mine shaft construction experiences,an optimized frozen depth plan for the shaft are proposed.The advantages and disadvantages are analyzed,and a technical and economic comparison are performed.Finally,the freezing depth of the shaft are determined.The research method can provides technical reference for determining shaft lining frozen depths under similar geological conditions.
Keywords：thick water-rich weakly cemented surrounding rockfrozen depthinfluencing factorsdistribution patterns of rock characte
Publication Date：2025-05-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1-7 )