锚注支护机理及支护效果的数值模拟分析

Mechanism of Bolt-Grouting Supporting and Numerical Simulation Analysis on Its Supporting Effect

采用有限单元法,分别对锚杆支护和锚注支护两种方式进行了数值模拟,对两种条件下围岩位移、应力以及巷道周围的塑性区的变化情况进行了分析,结果表明锚注支护可以显著地提高围岩强度及支护体系的承载能力,减小巷道的位移变形以及塑性区的大小,有利于维护巷道的稳定性。

By using finite element program, bolt supporting system and bolt-grout supporting system are simu lated respectively, and the displacement, stress and plastic zone of two supporting system are ana lyzed. The results indicate that the strength and bearing capacity of surrounding rock for boltgrouting roadway are greatly increased, displacement and plastic zone of roadway are decreased, which is helpful for controlling the deformation of roadway.