Application of tailing sand steel fiber sprayed concrete in iron mine tunnel
LU Li-hua
LUO Feng
LIU Wen-sheng
CHEN Xiao-yun
Abstract：In order to solve the application problem of tailing sand steel fiber sprayed concrete as the single layer lining of tunnel in the mining process of iron mine tunnel, the tailing sand was used to replace the natural river sand, and was taken as the fine aggregate to prepare the steel fiber sprayed concrete. In addition, such mechanical performance tests as the compressive, flexural and splitting tests were performed for the sprayed concrete with different steel fiber contents, and the optimal proportion of sprayed concrete and the influence of steel fiber contents on the concrete were determined. The numerical simulation analysis for the soft surrounding rock of iron mine was carried out with ANSYS software, the calculation results after the excavation of iron mine tunnel under the optimal lining thickness were discussed, and the reasonable shotcrete thickness of tailing sand steel fiber sprayed concrete was obtained through the analysis. The results show that when the steel fiber content in the concrete is 40 kg/m3 , the concrete has the optimal mechanical properties, and the compactibility, durability and quality stability of concrete also get enhanced. However, the increase in the compressive strength is not obvious.
Keywords：iron mine tunneltailing sand steel fiber sprayed concretesingle layer liningtestoptimal proportionnumerical simulationsoft surrounding rockshotcrete thickness
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 109-114 )