① 南京理工大学机械工程学院,江苏南京 210094;
② 国营732厂,山东淄博 255201;
③ 江苏省南京市南京理工大学机械工程学院, 210094
Numeric simulation of time-delayed stack source for surface vibration
Li Wen-bin1,3, Zheng Yu1, Wang Xiao-Ming and Fang Shi-xin1
1. College of Mechanic Engineering, Nanjing University of Science and Technology, Nanjing City, Jiangsu Province, 210094, China;
2. State-Owner 732 Factory, Zibo City, Shandong Province, 255201, China
Abstract：Using AUTODYN-2d program, the simulation study on vibration of surface is carried out by using 1.5kg conventional dynamite source and three-level time-delayed stack source respectively, and correlation and analysis of experimental results are carried out, which got the pressure curve that the seismic waves formed by two kinds of sources is at 10m below the changing bottom interface, the variation curves of shear velocity, displacement and pressure of surface vibration. The studied results showed that in a situation of reasonably controlling the interval of distance and time between separate levels of explosive column, the time-delayed stack source can get the stack of downgoing energy and be greater than the conventional dynamite in downgoing energy if the charge size is same; the shear velocity and displacement of vibration at surface point produced by time-delayed source are significantly less than that by conventional explosive column with same charge size, showing that the time-delayed stack source is more suitable for seismic exploration in complex surface area.
