排序方式： 共有14条查询结果，搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
7.
深部矿井地震散射波成像数值模拟 总被引：1，自引：1，他引：0
Conventional seismic exploration, mostly based on reflection theory, hardly has accurate imaging results for disaster geologic
bodies which have small scale, steep dip, or complex structure. In this paper, we design two typical geologic models for analyzing
the characteristics of scattered waves in mines for forward modeling by finite difference and apply the equivalent offset
migration (EOM) and EOM-based interference stack migration methods to mine prospecting. We focus on the analysis of scatted
imaging’s technological superiority to reflection imaging. Research shows: 1) scattered imaging can improve fold and make
the best of weak scattered information, so it shows better results than post-stack migration imaging and 2) it can utilize
the diffraction stack migration method-based ray path theory for mine seismic advanced prediction, so it provides an new efficient
imaging method for improving resolution of mine seismic exploration. 相似文献
8.
多煤层的反射地震响应特性研究 总被引：1，自引：1，他引：0
本文在不考虑地震波吸收和几何扩散衰减的情况下,利用单频谐和平面纵波垂直入射到煤层上,来研究煤层的调频效应,正演模拟地震波的频率与反射系数的关系,分析了频率对反射系数的影响.研究表明:当地下只有一组煤时,在中高频段煤层反射系数较大,当存在两组煤或是更多组煤层时,受上组煤层的屏蔽,下组煤在低频段的反射系数明显大于中高频段的反射系数,从而为克服上组煤层的屏蔽,得到好的下组煤层反射波提供了理论基础.在此基础上提出了提高下组煤反射波质量的采集方案.由于历史的原因,煤田勘探一般使用中高频检波器(主频60 Hz或是100 Hz),虽然有利于提高中高频反射波的能量,但牺牲了信号的低频部分,不利于提高反射波的分辨率,同时损失了下组煤层中起主要作用的低频反射波,得到的下组煤反射波资料一般很差. 相似文献
9.
10.