Stress Distribution Characteristics in Rock Surrounding Heading Face and its Relationship with Temporary Supporting

Abstract:

To solve the problem of underground tunneling face from the empty top, using FLAC3D analysis software, surrounding rock stability for coal roadway 2-1121 of Ganhe Coal Mine are analyzed in numerical calculation. (1) During the tunneling, distance drivage face head-on 0.5-1m at the roof of roadway deformation and destruction features are more obvious, the two sides of roadway are even more significant. (2) Ganhe Coal Mine roof deformation has been established with different empty the experience formula of the zenith distance, obtained Ganhe underground tunneling face reasonable empty zenith distance is 3.5m. (3) Temporary support can obviously reduce roof deformation, reduce thickness of plastic zone of the top, to improve the stability of surrounding rock tunneling faces.

• Periodical: Applied Mechanics and Materials (Volumes 568-570)
• Pages: 1684-1689
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.568-570.1684
• Online since: June 2014
• Authors: Zhong Han Chen
• Keywords: Heading Face, Hydraulic Drilling, Stress Distribution, Temporary Supporting

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DOI: 10.4028/www.scientific.net/amr.255-260.3711

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