高速屏蔽层下煤层反射波能量正演模拟  

High Velocity Shielding Layer Underside Coal Seam Reflection Wave Energy Forward Modeling

作　　者：莫亮台[1] 唐德林[1] 高久灵[1] 

机构地区：[1]中国煤炭地质总局第一勘探局物测队,河北邢台054000

出　　处：《中国煤炭地质》2008年第B09期77-78,86,共3页Coal Geology of China

摘　　要：根据Snell定理和Zoeppritz方程,采用数值模拟方法进行了6层水平介质模型的正演模拟,研究了反射地震波能量与入射角的关系,煤层反射振幅随入射角的变化情况,发现地震反射波能量在入射角接近临界角处突然增强。基于该规律,采用大炮检距接收屏蔽层下的能量可有效地削弱屏蔽层的影响,达到提高屏蔽层下反射波能量的目的。Based on the Snell theorem and Zoeppritz equation, to use the numerical simulation carried out forward modeling for 6 layered horizontal medium models. Studied the relation between reflection wave energy and incident angle, coal seam reflection amplitude changing along with incident angles, have found that seismic reflection energy buildup abruptly when incident angle is close to the critical angle. Based on this regulation, to use longer geophone offset to receive energy below the shielding layer can weaken shielding impact and gain the point to enhance reflection wave energy.

关 键 词：反射地震波 能量与入射角 ZOEPPRITZ方程 正演模拟 高速屏蔽层 

分 类 号：P631.44[天文地球—地质矿产勘探]