Rapid excavation and masonry construction technology of super-large cross-section horsehead gate in soft rock mine in Western China
ZHANG Shuyin
CHEN Xian
ZHANG Renjie
PAN Feng
LYU Zhen'gang
XU Youjie
Abstract：In view of the technical problems faced by the construction of the super-large section Matou-men(the excavation width is 13.30 m and the height is 21.16 m)at the junction of the auxiliary shaft and the 2-2 coal mine bottom in Caojiatan Coal Mine which is located in the soft rock stratum in West-ern China,this study comprehensively considers the complex geological conditions,adopts the collab-orative construction technology of"step-by-step excavation+collaborative support+reinforced concrete permanent lining",and puts forward"self-closed arch steel frame+integral steel formwork".This technology system effectively solves the problems of construction accuracy and efficiency of complex joints in mass concrete structures.The engineering application results show that the technology suc-cessfully overcomes the key technical challenges such as instability control of large-section surrounding rock,water disaster prevention and complex structure pouring,and provides reliable technical reference for similar super-large-section Matoumen projects in soft rock mining areas in Western China.
Keywords：extra large sectionMatoumenmass concretecollaborative supportsynchronous pouring
Publication Date：2026-02-28
Online Publishing Date：2026-01-31(First online date of this platform, not the publication date of the document)
Pages：7( 13-19 )