Three-dimensional numerical simulation and wave field analysis of seismic-while-digging model with faults
XU Shuai
JI Guangzhong
GAO Yakuan
JIAO Wenjie
HE Dixiu
Abstract：Seismic-while-digging exploration technology is one of the important exploration means in the intelligent development of coal roadway.Compared with the traditional exploration technology,it has the advantages of safety,high efficiency and synchron-ous exploration,which can improve the production efficiency and ensure the safety of mining production.According to the character-istics of the seismic-while-digging source,the stress mode of the cutting head of the boring machine is studied,and the force analys-is is carried out.The real data of the seismic source is loaded into the three-dimensional fault model for forward simulation,and the correlation conclusions of radial,transverse and vertical components are obtained(the radial,transverse and vertical components are collectively referred to as x,y and z components);on the basis of the force analysis of source of the seismic-while-digging,a Ricker wavelet point source is loaded on each point of force,and a single shot source is simulated to verify the effectiveness of cross-correl-ation processing of the following excavation seismic records.The results show that the effect of cross-correlation processing of x-component is poor,and the waveform of single shot recording is complete after cross-correlation processing of y-component and z-component;the energy of refracted shear wave and Rayleigh channel wave is strong in the x component,and these two groups of waves interfere with each other in the excavated seismic records,which leads to the poor effect of cross-correlation pulse processing;in y-component,the energy of Love channel wave is strong,and the energy of other wave groups is weak.After cross-correlation pulsation processing,the Love channel wave can be separated from the digging record;on the z component,Rayleigh channel wave can be separated after cross-correlation processing with the seismic-while-digging records;when the fault drop of y and z compon-ents is less than the coal thickness,the larger the drop is,the more obvious the reflected wave is after the cross-correlation pro-cessing with seismic-while-digging records.The fault angle ranges from 45° to 90°,and the reflected wave energy changes little with the cross-correlation of y component of excavation records.The z component is that the smaller the fault angle,the smaller the reflec-ted wave energy after cross-correlation with seismic-while-digging records.
Keywords：seismic-while-digginggeological explorationintelligent tunnelingadvanced detectionpulsationwave field analysis
Publication Date：2025-06-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 155-164 )