Mechanical characteristic of steel fibre concrete arc shaft wall structure
CAI Hai-bing
YAO Zhi-shu
RONG Chuan-xin
Abstract：Aiming at the difficult problem of reinforcement for coal mine shafts in the deep alluvium, steel fibre concrete arc shaft wall applied to outer shaft wall of freezing shaft was proposed. Mechanical characteristic of the shaft wall structure was analyzed by model test. The results indicate that steel fibre can enhance toughness of arc shaft wall, and circumferential peak strain of steel fibre concrete amount to 2 200 ～ 2 300 με before shaft wall is damaged. Steel fibre can also improve deformation character of the shaft wall, and the most radial displacement of shaft wall amount to more than 20 mm when it is damaged. Making use of finite element model which was validated by model test, bearing capacity influencing factor of arc shaft wall was analyzed, and the result indicates that compressive strength of concrete and thickness-diameter ratio are main factor, and that steel fibre content has less effect on beating capacity. In the end, beating capacity empirical formula of steel fibre arc shaft wall was gained.
Keywords：steel fibrearc shaft wall structureshaft reinforcementfinite element model
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 46-50 )