Stability Analysis of Slope Excavation during Unloading

Based on elastic-plastic mechanics and fracture mechanics theory, the fractal fissure and joint growth of the slope rock under compression and shear are analysed, the interaction mechanism of static load and dynamic load on different cracks are discussed also.The distribution regulation of stress and strain in rock slope before and after digging are described, the crack growth and propagation mechanism under the action of unloading are put forward.