Control Technology of Soft Rock Floor Heave in Deep Mine Seam Gateway
Abstract：In order to solve the serious floor heave deformation problems of water sump in the mine shaft bottom of Hujiahe Mine, through the simulation in-door test with physical similar material, the high stress of the surrounding rock, poor floor lithology and no support con- ducted in the floor would be the major factors to cause the serious floor heave in the mine roadway. Based on the plastic ring theory and to improve the floor strength and the completed support structure stability, the comprehensive support technology with the bolt/steel mesh/ shotcretting/lining ＋ reversed floor arch ＋ floor bolt ＋ reinforced bar mesh was applied to control the floor heave deformation of the mine roadway. The surface displacement observation results of the mine roadway showed that when the comprehensive support technology ap- plied, the convergence between the two sidewalls of the mine roadway was not over 10 ram, the convergence between the roof and floor was not over 12 mm and the floor heave problem of the water sump in the mine shaft bottom was effectively solved.
Keywords：seam gateway with soft rockfloor heavereversed archsimilar simulationsurrounding rock deformation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 5-7,65 )