基于多模态分离的CMP解析法在面波勘探中的应用
|
摘要
为了提高瑞雷面波探测的横向分辨率,在工程勘察领域通常采用类似地震反射多次覆盖叠加技术的瞬态多道瑞雷面波方法,由于该方法直接使用原始数据进行CMP叠加处理,在计算频散曲线时高模式面波对其产生较大干扰,从而影响最终的解释结果。因此提出将原始数据利用多模态分离之后,用分离的基阶面波数据,进行CMP解析处理,使用SASW法提取频散曲线,并用粒子群算法进行频散曲线的反演。通过理论模型及实例分析得出基于多模态分离的CMP解析法可以提高频散曲线计算的准确性,从而进一步提高了瑞雷面波探测的可靠性。
In order to improve the lateral resolution of Rayleigh surface wave detection, a transient multi-channel Rayleigh wave method similar to seismic reflection multiple coverage and superposition technology is usually used in engineering exploration field. Owing to the direct use of the original data for CMP superposition processing, when calculating the dispersion curve, the high-mode surface wave interferes with it greatly, thus affecting the final interpretation result. This paper points out that after the original data are separated by multi-mode, the separated base-level surface wave data are used for CMP analysis, the SASW method is adopted to extract the dispersion curve, and the particle swarm algorithm is used to inverse the dispersion curve. Through theoretical model and case analysis, the CMP analytical method based on multi-modal separation can improve the accuracy of dispersion curve calculation, and further improve the reliability of Rayleigh surface wave detection.
In order to improve the lateral resolution of Rayleigh surface wave detection, a transient multi-channel Rayleigh wave method similar to seismic reflection multiple coverage and superposition technology is usually used in engineering exploration field. Owing to the direct use of the original data for CMP superposition processing, when calculating the dispersion curve, the high-mode surface wave interferes with it greatly, thus affecting the final interpretation result. This paper points out that after the original data are separated by multi-mode, the separated base-level surface wave data are used for CMP analysis, the SASW method is adopted to extract the dispersion curve, and the particle swarm algorithm is used to inverse the dispersion curve. Through theoretical model and case analysis, the CMP analytical method based on multi-modal separation can improve the accuracy of dispersion curve calculation, and further improve the reliability of Rayleigh surface wave detection.
引文
[1] 张碧星,肖柏勋,杨文杰,等.瑞利波勘探中“之”字型频散曲线的形成机理及反演研究[J].地球物理学报,2000,43(4):557-567.
[2] Park C B,Mille R D,Xia J.Multichannel analysis of surface wave[J].Geophysics,1999,64:800-808.
[3] 朱翔鹏,张学强,严哲.瑞雷波在探测地下防空洞的应用研究[J].工程地球物理学报,2007,4(2):106-109.
[4] 董海文.瞬态瑞雷面波法在公路工程质量检测中的理论与应用研究[D].长沙:湖南大学,2005.
[5] 潘自强,徐贵来,吴曲波.基于瑞雷面波频散曲线反演的岩体力学参数求取方法[J].世界核地质科学,2012,29(2):106-109.
[6] 赵秀丽,丁晓峰,于帅兵,等.瞬态瑞雷面波在滑坡工程勘察中的应用[J].工程地球物理学报,2016,13(2):227-230.
[7] Koichi Hayashi,Haruhiko Suzuki.CMP cross-correlation analysis of multi-channel surface-wave data[J].Exploration Geophysics,2004,35:7-13.
[8] Hayashi K,Hikima K.CMP analysis of multi-channel surface wave data and its application to near-surface S-wave velocity delineation[C].//Symposium on the Application of Geophysics to Engineering and Environmental Problems.Environment and Engineering Geophysical Society,2003:1 348-1 355.
[9] 林宏一.表面波探测的CMP分析[C]//物理探测学会第105次学术演讲会论文集.日本物理探测学会,2001:13-16.
[10] 崔德海,李凯,刘铁.瞬态多道瑞雷面波的CMP解析法[J].工程地球物理学报,2009,6(增刊):11-16.
[11] 马涛.多次覆盖观测系统在瑞雷波勘察中的应用[J].工程地球物理学报,2012,9(2):205-211.
[12] 鲁来玉.分层介质半空间瑞雷波模式分析和介质参数反演[D].北京:中国科学院研究生院,2004.
[13] 张大洲,顾汉明,熊章强,等.基于多模态分离的面波谱分析方法[J].地球科学(中国地质大学学报),2009,34(6):1 012-1 018.
[14] 熊章强,张大洲,秦臻,等,2008.瑞雷波数值模拟中的边界条件处理及模拟实例分析[J].中南大学学报(自然科学版),39(4):824-830.
[15] 张大洲,熊章强,顾汉明.高精度瑞雷波有限差分数值模拟及波场分析[J].地球物理学进展,2009,24(4):1 313-1 319.
[2] Park C B,Mille R D,Xia J.Multichannel analysis of surface wave[J].Geophysics,1999,64:800-808.
[3] 朱翔鹏,张学强,严哲.瑞雷波在探测地下防空洞的应用研究[J].工程地球物理学报,2007,4(2):106-109.
[4] 董海文.瞬态瑞雷面波法在公路工程质量检测中的理论与应用研究[D].长沙:湖南大学,2005.
[5] 潘自强,徐贵来,吴曲波.基于瑞雷面波频散曲线反演的岩体力学参数求取方法[J].世界核地质科学,2012,29(2):106-109.
[6] 赵秀丽,丁晓峰,于帅兵,等.瞬态瑞雷面波在滑坡工程勘察中的应用[J].工程地球物理学报,2016,13(2):227-230.
[7] Koichi Hayashi,Haruhiko Suzuki.CMP cross-correlation analysis of multi-channel surface-wave data[J].Exploration Geophysics,2004,35:7-13.
[8] Hayashi K,Hikima K.CMP analysis of multi-channel surface wave data and its application to near-surface S-wave velocity delineation[C].//Symposium on the Application of Geophysics to Engineering and Environmental Problems.Environment and Engineering Geophysical Society,2003:1 348-1 355.
[9] 林宏一.表面波探测的CMP分析[C]//物理探测学会第105次学术演讲会论文集.日本物理探测学会,2001:13-16.
[10] 崔德海,李凯,刘铁.瞬态多道瑞雷面波的CMP解析法[J].工程地球物理学报,2009,6(增刊):11-16.
[11] 马涛.多次覆盖观测系统在瑞雷波勘察中的应用[J].工程地球物理学报,2012,9(2):205-211.
[12] 鲁来玉.分层介质半空间瑞雷波模式分析和介质参数反演[D].北京:中国科学院研究生院,2004.
[13] 张大洲,顾汉明,熊章强,等.基于多模态分离的面波谱分析方法[J].地球科学(中国地质大学学报),2009,34(6):1 012-1 018.
[14] 熊章强,张大洲,秦臻,等,2008.瑞雷波数值模拟中的边界条件处理及模拟实例分析[J].中南大学学报(自然科学版),39(4):824-830.
[15] 张大洲,熊章强,顾汉明.高精度瑞雷波有限差分数值模拟及波场分析[J].地球物理学进展,2009,24(4):1 313-1 319.