Study On The Dynamic Response And Support Parameters Of Adjacent Tunnel Wall Rock Under Dynamic Load

Recently, appear more and more understructure work. Borehole-blasting method still is important for usually job practice such as understructure work, rock's excavation. Usually, designing the safety of understructure work ignore dynamic load lead to damage supported structural. This paper studies that dynamic load influence for the stability of understructure work. Present comfortable support type and optimization parameter.According to blasted breaking mechanics and damaged failure theory, the paper introduces the development of blasting for work, blasting static and dynamic mechanics character. Introduced the blasting stress wave transmits attenuation rule and the rock's damage model in middle and far zone. Create rock's damage mechanics model for blasting dynamic.Overall systematic analyse that blasting wave spread, energy, amplitude frequency and hazard distinction.Compendium principle support type for understructure work. By blastmateâ…¢actual multiple measures, applying for ppv regression to particle vibration,single go-off apothecaries and distance.The formulate isV= 200(Q^1/3/R)^1.51.analysed blasting wave effect adjacent tunnel stability, present majorized scheme for tunnel supported structural's paramters.Today, numerical simulation analysis is more and more important in the engineering geology research field, especially in the quantitative evaluation. This paper applies FLAC2D software for engineering, spectrum analysis for the vibration velocity of actual measurement, editing parameter applies for FLAC. Compared to two results (static and dynamic), analysis data in order to blasting dynamic load influence support parameter. Present comfortable conclusion and recommendations. The vibration velocity, stress and distortion of lining and surrounding rock were analyzed, and some rules and characteristics about the vibration influence of tunneling blasting on the existing tunnel were put forward by analyzing and comparing the different results. Compared to the result of numerical simulation and actual measurement for underground cavity. Make the engineering more safety, economical .comfortable.