Chemical Grouting Technology Applied to Handle Quicksand Stratum of Mine Inclined Shaft
WU Huai-lin
QIAO Zheng-hua
HUAN Qiu-cheng
YANG Yong
Abstract：A mine air returning inclined shaft of Songxinzhuang Mine had an inclination of 22° ,a net cross section of 16.3 m2 and an inclined length of 1 465 m.When the mine inclined shaft was headed at length of 283.4 m ,a quicksand stratum with a thickness of 8.3 m and a inclined length of 22 m was suddenly occurred.A water inflow of 15 m3/h was come from the quicksand stratum ,a conventional method was applied to the handling with no effect and the project construction had to stop.According to the certain condition ,with a comparison of the plans ,a chemical grouting technology was deter-mined and applied to the handling of the quicksand stratum. The chemical grout was pre-grouted into the quicksand stratum at the mine inclined shaft heading face and then a water sealing and reinforce-ment were conducted. The combination of the pilot support ,short sectional heading and support ,pow-erful support ,frequent measurements and other technical measures was conducted for the construc-tion. After the plan was implemented ,the mine inclined shaft was safely and successfully passed through the section of the water bearing quicksand stratum with an expected effect.
Keywords：mine inclined shaftchemical groutingquicksand stratumpilot supportshort sectional heading and support
Publication Date：2015-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 10-14 )