Deformation failure and non-harmonious control mechanism of surrounding rocks of roadways with weak structures

作者：Fan Ke Gong^*; Jiang Jin Quan

来源：Journal of China University of Mining & Technology, 2007, 36(1): 54-59.

• Coal measures strata
• Control location
• Damage zone growth character
• Deformation failure
• Horizontal pressure coefficient
• Non equilibrium characteristic
• Non harmonious control
• Plastic areas distribution
• Roadway
• Stress state
• Surrounding rock weak structures

According to the non-equilibrium characteristic for the deformation failure of roadways surrounding rocks with weak structures in the coal measures strata, the concepts of control location of deformation failure in weak structure body and non-harmonious control of surrounding rocks were proposed. The non-harmonious control mechanism of surrounding rocks of roadways with weak structures was analyzed. The plastic areas distribution and non-harmonious control of roadways with weak structures were simulated by finite element method (FEM). The results show that the damage zone growth characters and the stability of surrounding rocks of roadways are influenced by weak structure types of surrounding rocks and stress states, and the weak structure body has the leading role. When the coefficient of horizontal pressure λ < 1, the weak structures type II, III, VI should be first chosen; When λ > 1, the weak structures type II, IV should be first chosen; When λ=1, the type I or II should be chosen separately according to different roadway supporting types.

• 出版日期2007
• 单位山东科技大学