层理劣化影响下破碎顶板巷道变形机理及控制研究#br#

doi:10.11799/ce202406009

Abstract

Abstract:

In order to solve the difficult problem of supporting the roadway under the laminated deteriorated broken roof, the deformation and damage law of the roof slab under the laminated deterioration of the roadway was studied, and the corresponding support countermeasures were proposed and applied in the field, using the east four belt extension road of Xinzhi coal mine as the engineering background. Using the interface unit in FLAC3D, the roof model of the laminated roadway was established, the deformation and damage characteristics of the broken roof slab under the influence of laminae were analyzed, and the deformation law of the roadway surrounding rock with different support schemes was compared. For the laminated roof slab, the high prestressed bolt can fully improve the self-bearing capacity of the roof slab, and then reduce the bolt support density, which can control the deformation of the roadway surrounding rock and also improve the digging speed. Finally, the proposed support measures were applied to the site, and the monitoring data showed that the support measures can ensure the stability of the roadway surrounding rock and help to improve the roadway digging speed, and provide a reference for similar laminar deterioration of the roadway support under the broken roof.

CLC Number:

TD353

References

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Roadway Support under Broken Roof Based on Laminar Degradation Research and Field Application

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