Stress analysis of the stope under the influence of horizontal tectonic stress
by Fengda Zhang
International Journal of Mining and Mineral Engineering (IJMME), Vol. 11, No. 3, 2020

Abstract: The horizontal tectonic stress is one of the important reasons for water inrush, which is mostly caused by the geological structure. The stress distribution around the stope is analysed by revised mechanical model. The distinctions in the maximum principal stress between revised formula and the original formula are analysed. Numerical models are established with different horizontal tectonic stress intensity in far field. When the horizontal tectonic stress is smaller than the vertical stress in far field, comparing to original maximum principal stress, the maximum principle stress of roof and floor in front of stope is larger, and the maximum principle stress of the roof and floor in the gob is smaller. This leads to the increase of shear stress near the stope, and the shear plastic damage of rock mass is more prone to occur. The result of theoretical model is validated by numerical simulation.

Online publication date: Thu, 17-Sep-2020

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