深井巷道围岩主应力差演化规律物理模拟研究

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Abstract In the engineering background of a failure deep mine roadways of in Shandong Yuncheng Mine，its excavation unloading whole process is physically simulated by the large scale(1.0 m×1.0 m×1.0 m) three-dimension test system. The failure patterns and range of surrounding rock of deep mine roadways with no support are obtained by the method of model thin section. Using the independent development testing elements for three-dimensional stress，the actual loading-unloading stress paths and stress states of surrounding rock in different depths of deep mine roadways are revealed，and the evolution law of deviatoric stress inside and outside of the broken rock zone are mainly studied. Based on the results of the failure patterns and range of surrounding rock，the evolution mechanism of deviatoric stress is initial explored.

Key words： mining engineering deep mine roadways principal stress difference evolution law physical simulation

Received: 25 November 2011

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http://www.rockmech.org/EN/Y2012/V31/Is2/3811

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