低地应力区地下洞室初始和二次应力离散元模拟

采用了二维离散元法，以西北某市水利地下洞室工程为例，对低地应力状态下洞室开挖前后，初始应力和围岩二次应力及其相应特征，进行了二维离散元数值模拟研究。该项研究工作，将有助于进一步研究低地应力条件下洞室围岩稳定性和围岩变形破坏机理，因此它具有重要的理论价值和实际意义。

DEM Simulation of Initial and Secondary Stresses of Underground Excavation in Low Ground Stress Region

D-DEM was used in the numerical simulation study of the initial stress and the secondary stress of the surrounding rockmass before and after the underground excavation in low ground stress state, with the case of an underground excavation for water conservancy purpose in a city in Northeast China. This research will be helpful in the further study on the stability and the destructive mechanism of the deformation of the rockmass surrounding the underground excavation in low ground stress condition, thus being of important theoretical value and practical significance.