Impact of orientation of blast initiation on ground vibrations  

作　　者：Dayamoy Garai Hemant Agrawal Arvind Kumar Mishra 

机构地区：[1]Indian Institute of Technology(ISM),Dhanbad,India [2]Central Mine Planning and Design Institute Limited,Ranchi,India

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2023年第1期255-261,共7页岩石力学与岩土工程学报（英文版）

摘　　要：The blast-induced ground vibrations can be significantly controlled by varying the location and orien-tation of point of interest from blast site.The blast waves generated due to individual holes get super-imposed and resultant peak particle velocity(PPV)generates.With the orientation sequence of holes blasts on site,the superimposition angle of wave changes and hence results in significant variation in resultant PPV.The orientation with respect to the initiation of blasts resulting in lowest PPV needs to be identified for any site.By knowing the PPV contour of vibration waves in mine sites,it is possible to reduce the vibration on the structures by changing the initiation sequence.In this paper,experimental blasts were conducted at two different mine sites and the PPV values were recorded at different ori-entations from the blast site and its initiation sequence.The PPV contours were drawn to identify the orientation with least and highest PPV generation line.It was found that by merely changing the initi-ation sequence of blasts with respect to the sensitive structure or point of interest,the PPV values can be reduced significantly up to 76.9%.

关 键 词：Peak particle velocity(PPV) Initiation orientation Wave superimposition Orientation of blast Blast initiation 

分 类 号：TU45[建筑科学—岩土工程]