Numerical Simulation Of Seismic Wave In Metal Mine And Analysis Of Wave Field

As the development of exploring blind mine and deeply concealed mine, Traditional exploring methods of metal mine can not fully meet the requirements of deeply exploration. Under certain conditions, Because of large exploring depth and high resolution features of seismic exploration,It can breaks defects of traditional non-seismic exploration methods,and refects their potentials and advantages. Based on complexity of metal mine, seismic exploration method of metal mine currently still stay in the initial stage, through seismic numerical simulation of exploring metal mines, can enhance understangding seismic wave of moving in metal media, improve surseying system, and verify the accuracy of seismic geological interpretation.Based on the analysis of seismic wave theory, from one order velocity-stress elastic wave equation and acoustic equation, the using of high order and staggered grids in time and space derivative of the difference approximation is derived,and the difference schemes of elastic wave equation and acoustic equation are established, space of grids and time sampling rate are controlled,PML conditions of absorbing boundary is added, and completing modelling metal mine typical models included simple heterogeneous,lens,tilt body,portfolio body,crater ore body. By the forward calculation of seismic waves,We can get seismic records of elastic wave and acoustic, seismic profile of self-percussion and self-receicing, and have a analysis of wave field.According to seismic numerical simulation and analysis in effect in using two orders in time and ten orders in space staggered finite-difference technique to simulate seismic waves in the metal mine,and controlling the condition of stablity, and adding PML absorbing boundary, we can achieve a good result of accuracy and modelling seismic wave which moving in metal media. We analyze the characteristics of seismic wave field, and find that seismic wave of metal mine media can scatter, diffraction, transform and mutually superpostion, the siesmic wave field is often complex.