... distribution show different characteristics of zonation from surface to inside of the slopes. As the valley incision depth increases, the position of tensile stress concentration area in right slope has changed from inside to surface, and lastly to the top of overlying fault. Stress state of left slope...

... of scheme 1. It can be seen from Figure 4 that effective stress relaxation zones appear around the blasting holes in the left sidewall. The stress relaxation zones extend from the left bot- tom of sidewall to the left of arch waist. The position of stress concentration shift from outline nearby to the deep...

... with backfilled soil. After a comparative analysis of the monitoring data, the authors define the key controlled zones of rock unsymmetrical deformation and stress concentration, they advise some effective measures to avoid partial tunnel destruction. Through monitoring the blasting vibration on key controlled...

... or pore pressure, then overcomes the compressive borehole stress, and tensile stress concentration will appear preferentially at the notching tip as pumping continues. Fractures are initiated along the tip as concentration stress reaches the tensile failure stress of the rock medium. Reservoir...

... gradually the micro pore and cracks make the stress concentrate, the damage degree gradually increases and the ability to resist deformation decreases. After the load exceeds stress limit, the connection of micro crackles develops into macro breaking plane, thus entering destabilizing breakage stage...