The Surrounding Rocks Pressure Stress Distribution Law And Asymmetric Deformation Mechanism Of Deep Dynamic Pressurized Roadway

Under the complex conditions of threehighand onedisturbance, deep roadway support problem is a key factor influence of coal mine high efficient and safe production. Under the deep and complex condition, there is a widespread asymmetric characteristics of roadway deformation damage and traditional symmetric supporting method can’t completely match the asymmetry of deep roadway deformation. The most reasonable and effective way support method can be chosen, with the in-depth understanding of stress distribution and deformation law of deep roadway surrounding rock. This paper systematically expounds stress distribution and failure deformation characteristics of the deep roadway surrounding rock. The analysis and summary of asymmetric deformation mechanism and affecting factors of roadway are made in this paper. The more profound analysis and discussion of asymmetric deformation of roadway under dynamic pressure are made by means of numerical simulation and field measurement.The stress distribution and deformation characteristics of deep roadway surrounding rock under the influence of coal mining and without the influence of coal mining are made by Based on elastic-plastic mechanics, rock mechanics and related knowledge of mine pressure. The deep roadway deformation mechanics, high stress developing mechanism and structure deformation mechanism are summarized. The types of weak structure is summarized and the influence of weak lithology structure on the roadway deformation and the roadway instability weak lithology structure is analyzed in detail. The summary and analysis of asymmetric deformation characteristics and the main influence factors of deep tunnels are carried out.The distribution regularity of stress, displacement and plastic zone change characteristic under the influence of coal mining are analyzed through the establishment of numerical model. The asymmetric deformation of roadway under coal mining is summarized. the theoretical analysis and numerical simulation are verified through the settlement data from field measurement of the11-2down-dip of Guqiao coal mine, which provides a theoretical reference for the deep roadway of asymmetric deformation control and support.