基于小保当二号煤矿薄煤层超宽工作面的透射高精度成像研究  

Study on high-resolution transmission imaging based on super-wide working face in thin coal seam of Xiaobaodang No.2 Coal Mine

作　　者：麻银斗 张慧峰 徐裴 李志勇 孙瑞雪 白喜成 刘随强 MA Yindou;ZHANG Huifeng;XU Pei;LI Zhiyong;SUN Ruixue;BAI Xicheng;LIU Suiqiang(Shaanxi Xiaobaodang Mining Co.,Ltd.,Yulin,Shaanxi 719399,China;Beijing GEOCMW Geophysical Exploration Engineering Technology Co.,Ltd.,Haidian,Beijing 100038,China)

机构地区：[1]陕西小保当矿业有限公司,陕西省榆林市719399 [2]北京中矿大地地球探测工程技术有限公司,北京市海淀区100038

出　　处：《中国煤炭》2024年第10期104-114,共11页China Coal

摘　　要：针对小保当二号煤矿2~3 m厚煤层450 m超宽工作面特点,研究应用地震勘探方法构建高精度工作面成像,提升此种煤层的开采效率。根据采集的双透射地震数据,基于三维弹性波数值模拟方法测试分析煤层工作面的波场产生情况,通过对比合成数据与实际数据的槽波频散曲线,认识不同波形的频带特征,再对三分量数据的不同波段做极性分析,进一步明确本工作面的地震属性。对该双透射实际数据进行处理,通过全波形反演技术做速度分析,得到最优化三维速度模型,从而获得高精度三维逆时偏移成像的纵波和横波成像结果。与巷道地质信息及已回采剖面对比,计算结果与真实揭露值接近,本研究思路有助于高精度煤岩分界面的复刻。Based on the characteristics of the 2 to 3 meters thick coal seam and 450 m super-wide working face in Xiaobaodang No.2 Coal Mine,seismic exploration method was applied to construct high-precision working face imaging and improve the mining efficiency of the coal seam.According to the collected dual transmission seismic data,the wave field generation of the coal seam working face was tested and analyzed using the three-dimensional elastic wave numerical simulation method.By comparing the slot wave dispersion curves of the synthesized data with the actual data,the frequency band characteristics of different waveforms were recognized,and polarity analysis was performed on different bands of the three component data to further clarify the seismic properties of this working face.Through processing the actual data of the dual transmission,and performing velocity analysis by full waveform inversion technology,an optimized 3D velocity model was obtained,thereby obtaining high-precision primary wave and shear wave imaging results of 3D reverse time migration imaging.Compared the geological information of the roadway with the mined profiles,the calculated results were close to the true exposed values.This research approach was helpful for high-precision replication of coal rock interfaces.

关 键 词：透射地震 高精度 三分量 极性分析 全波形反演 三维成像 

分 类 号：P631[天文地球—地质矿产勘探]