Experimental Research On The Interference To Decrease Rock Blasting Vibration

With blasting engineering is widely used in the construction of national infrastructure, people are increasingly concerned about the impact of blasting vibration on the surrounding environment and buildings. For a long time, Domestic and foreign scholars have different views on the study of interference to decrease vibration, putting forward different views on the control of blasting vibration. In this paper, the interference to decrease rock blasting vibration is researched mainly from the theoretical and experimental aspects, and providing reference for the blasting construction of similar projects in the future.In this paper, based on the vibration velocity mechanism which can reflect the vibration intensity in the propagation process of seismic wave in the round, studying the rock blasting vibration attenuation law, concluding the key to achieve interference to decrease vibration is to establish the reasonable differential delay time. Afterwards, the differential delay time is closely related to the main vibration cycle through the analysis on fault-phase vibration reduction mechanism, harmonic wave superposition and spherical wave superposition. At last, the rationality of differential delay time which is theoretical analyzed is demonstrated through the open-cut foundation ditch and tunnel blasting test in Shenzhen Metro Line 11, and establishing the best differential delay time under field test conditions. Keeping the best differential delay time at the same based on the tunnel group hole blasting, adjusting the blasting parameters in a reasonable state, proving the differential delay time is the most important factor that has an effect on interference to decrease vibration from the perspective of test.