Laws of Formation and Evolution of Pressure Arch in Coal Mining Adjoining Rock

Abstract:

Based on numerical simulation of computing Software ANSYS, the curve of arching coefficient variation of pressure arch due to actual mining was analyzed aiming to a special mining face, the law of stress transfer and change in surrounding rock was discussed, and the evolving features and characteristics of pressure arch was obtained. The analysis and discussion show the following facts: Arch body will become thicker and stress in the arch body increases with working face’s driving distance increasing; the morphology of pressure arch transits from ellipsoid with long axis in the vertical direction to ellipsoid with long axis in the horizontal direction along the trend of working face; along the tendency of working face, the morphology of pressure arch is a ellipsoid with long axis in the vertical direction.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 2596-2600
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.2596
• Online since: May 2011
• Authors: Xiao Li Du, Hong Wei Song, Jie Chen
• Keywords: Arch-Forming Coefficient, Dynamic Mining Pressure, Evolution Law, Pressure Arch, Stress Concentration

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