Technology of Gob-side Entry Retaining Using Concrete-filled Steel Tubular Column
SHEN Yusan
WU Kai
ZHANG Tao
HUANG Wanpeng
WANG Jun
DONG Qinkai
XIA Zhicun
Abstract：In order to solve the tense situation of excavation and replacement of Luxi Coal Mine and realize the purpose of high-efficiency gob-side entry retaining under high stress conditions, based on the engineering geological conditions and problems of A02 working face in the 3rd lower section of Luxi Coal Mine, this paper proposes a new kind of roadside supporting technology which is composed of concrete-filled steel tubular column + flexible cushion+ roof control anchor cable + reinforcement in the road + wind protection measures for gob-side entry retaining, the technical parameters of roadway along gob are optimized. This paper mainly studies the on-site construction technology of concrete-filled steel tubular piers gob-side entry retaining, and solves the key technical links of pier erection, perfusion and auxiliary strengthening support, thus forming a perfect construction process. Through the industrial test in the field, the new technology scheme of gob-side entry retaining ensures the integrity of the reserved roadway and controls the surrounding rock stably; moreover, the construction process is simple, which achieves the effect of high strength and high efficiency of gob-side entry retaining.
Keywords：steel tubular columngob-side entry retainingscheme optimizationconstruction technologysurrounding rock stability
Publication Date：2019-01-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 86-90,94 )