利用倾斜截面的反射波测定覆盖层的波速  

Measurement of superstratum wave velocity with reflection wave on dip section

作　　者：李启成[1] 张晶[1] 刘晓丹[1] 闫颖川 

机构地区：[1]辽宁工程技术大学地质系,阜新123000

出　　处：《地球物理学进展》2015年第1期425-428,共4页Progress in Geophysics

基　　金：黑龙江省教育厅2011年科研项目(12513082);博士启动基金(13-1027)资助

摘　　要：波速测量得到的是一段地层中的平均速度,由于地震波初至时刻难于准确确定等原因,测量结果存在较大误差.采用共反射点的多次覆盖技术能更准确地测定地震波的传播速度,但必须准确掌握反射面的深度.在不准确掌握反射面厚度的情况下,提出利用倾斜截面测定波速.这种技术要求掌握反射截面的倾角,特别适合有断层出露和基岩出露的地区.把上述技术应用于龙门山断层区,测得了该区地震波传播速度,说明利用倾斜反射截面测定波速是有价值的尝试.The measurement result of wave velocity is earthquake wave average velocity in stratum,because original reach time of earthquake wave is difficult to be decided,measurement result has more deviation.Earthquake wave velocity can be computed more accurately with common reflection point multiple cover technique,but,the deep of reflection section needs to be know accurately.In the condition of the deep of reflection section is not known accurately,it is put forward to measure wave velocity by mean of reflection wave on dip section.This technique need to know the dip angle of reflection section,so,It is more useful in the areas that the fault or exposure expose.We use above technique to Longmenshan fault areas,earthquake wave velocity is obtained,it is valuable to measure wave velocity by mean of reflection wave on dip section.

关 键 词：波速 地震波 倾斜截面 地震 

分 类 号：P315.7[天文地球—地震学]