DOI: 10.11799/ce201803009
Research and application of temporary support technology for dynamic pressure bearing of gob-side entry retaining formed by roof cutting and pressure relief
WANG Ya-jun
YANG Jun
GAO Yu-bing
WANG Er-yu
FU Qiang
WANG Jian-wen
Abstract：According to th significant influence of dynamic pressure to the gob-side entry retaining formed by roof cutting and pressure relief for a certain period, the basic idea of roof deformation control with temporary support technology for dynamic pressure bearing was proposed. Based on theoretical calculation and analysis, the action mechanism of temporary support technology for dynamic pressure bearing was discussed. It was concluded that the temporary support had limited effect on the"given deformation"of the upper roof but was very effective in controlling the deformation or separation of the lower roof. The mechanism of temporary support for dynamic pressure bearing was simulated and analyzed by finite difference simulation software FLAC3D. The design idea of temporary support technology for dynamic pressure bearing was proposed and was been successfully applied in the Ningtiaota Coal Mine. Test data show that the deformation of the roof was generally less than 89mm, and the control effect of the roof was good under the action of the temporary support technology for dynamic pressure.
Keywords：roof cutting and pressure reliefgob-side entry retainingdynamic pressuretemporary supportshort wall beam
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 30-36 )