DOI: 10.11799/ce202507010
Research on frozen shaft wall design for mechanical rock breaking in weakly cemented and water-saturated formations
WANG Peng
WEI Zihang
WANG Heng
Abstract：Starting from the development of the frozen shaft wall structure type in China,different types of shaft wall structures for weakly cemented and water-rich rock formations were listed and analyzed,and the rationality of selecting the double-layer cast-in-place reinforced concrete shaft wall structure was determined when using shaft boring machines for shaft excavation.The technical and economic comparison of the Xinjie eastern return air shaft wall structure was carried out from the perspectives of permanent radial load and support material strength design value.The calculation results show that:compared with scheme I,in the scheme III and scheme II,the shaft wall thickness is 400 mm and 200 mm thinner;the concrete casting volume is 23%and 8%less;the steel consumption varies by 14%and-2%,respectively;and the support investment of the two is both brought down by 9%;and the economic indicators of the well shaft are 16%and 14%lower.
Keywords：freezing shaft wallwater pressure reduction coefficientsupport material strengthreinforcement ratio
Publication Date：2025-07-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 67-73 )