DOI: 10.11799/ce201609012
Numerical analysis on influence of long casing pipe on the floor deformation
LI Jian-bo
XU Yan-chun
HAN Jiu-fang
Abstract：As the grouting casing is intensively arranged with large length in working face floor of Dashui mining area, in order to study the influence of grouting casing pipe on the deformation of rock mass in coal seam floor, a numerical model was set up with FLAC3D . Numerical models were established based on the geological conditions and casing layout of 11030 working face in Zhaogu No. 2 coal mine. The damage and stress changes before and after the grouting was simulated, to determine the influence and control mechanism of casing pipe grouting-reinforcement for floor deformation control. Simulation results show that, due to impedance of the casing, local concentrated stress is generated at the casing pipe, and the stress field is not symmetrical and continuous under the action of casing. With the casing pipe, the vertical displacement is changed by 11. 5%, 29. 7% and 25% at different monitoring points. Displacement change in the transition zone is the biggest, which is the key area for floor failure control.
Keywords：groutingcasingfloor deformationnumerical analysismine water disaster
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 43-45 )