Application of Gaussian Beam Summation Migration in Reflected In-seam Wave Imaging  

作　　者：HAN Jianguang LÜQingtian ZHANG Zhiheng YANG Shun WANG Shuo 

机构地区：[1]Chinese Academy of Geological Sciences,Beijing 100037,China [2]Shandong Taishan Resources Exploration Co.,Ltd.,Jinan 250104,China

出　　处：《Acta Geologica Sinica(English Edition)》2024年第1期276-284,共9页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42174157);the CAGS Research Fund(Grant No.JKY202216);the Chinese Geological Survey Project(Grant Nos.DD20230008,DD20233002).

摘　　要：The geological conditions for coal mining in China are complex,with various structural issues such as faults and collapsed columns seriously compromising the safety of coal mine production.In-seam wave exploration is an effective technique for acquiring detailed information on geological structures in coal seam working faces.However,the existing reflected in-seam wave imaging technique can no longer meet the exploration precision requirements,making it imperative to develop a new reflected in-seam wave imaging technique.This study applies the Gaussian beam summation(GBS)migration method to imaging coal seams'reflected in-seam wave data.Firstly,with regard to the characteristics of the reflected in-seam wave data,methods such as wavefield removal and enveloped superposition are employed for the corresponding wavefield separation,wave train compression and other processing of reflected in-seam waves.Thereafter,imaging is performed using the GBS migration technique.The feasibility and effectiveness of the proposed method for reflected in-seam wave imaging are validated by conducting GBS migration tests on 3D coal-seam fault models with different dip angles and throws.By applying the method to reflected in-seam wave data for an actual coal seam working face,accurate imaging of a fault structure is obtained,thereby validating its practicality.

关 键 词：reflected in-seam wave Gaussian beam summation migration numerical tests fault 

分 类 号：P631.4[天文地球—地质矿产勘探]