西安地裂缝人工地震反射波勘探覆盖次数  

The folds in seismic reflection exploration for Xi'an ground fissure investigation

作　　者：程耀[1] 隋成兴 杨龙伟[1] 巨朝晖 李忠生[1] 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《物探与化探》2015年第1期166-171,共6页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(40972215)

摘　　要：在西安地裂缝勘察中,人工地震反射波勘探的覆盖次数越高,叠加剖面信噪比越高,但同时也增加了施工难度,提高了勘探成本。为了研究不同覆盖次数在西安地裂缝地震勘探中勘探效果,笔者通过三个场地地裂缝地震勘探资料的处理分析,采用抽稀炮点方法得出不同覆盖次数的叠加剖面,对比分析了不同剖面的勘探效果,结合验证的钻孔资料,总结了不同覆盖次数的勘探效果,认为在原始记录信噪比较高的情况下,12次反射波覆盖能明显确定地裂缝异常,最低覆盖次数不要低于6次。In the investigation of Xi＇an ground fissures,the higher the fold of seismic reflection exploration,the higher the signal-to-noise ratio profile is obtained.Nevertheless,it also increases the difficulty of field work and raises the exploration cost.In order to study the effect of different folds in Xi＇an ground fissure seismic exploration,the authors chose seismic reflection data in three different sites as examples for analysis.These seismic data were processed in different stacking folds via the method for reducing shot points.The stacking profiles with different folds were compared with each other to extract exploration effect in combination with validated borehole informa-tion.It is believed that,if original field records have high signal-to-noise ratios,12 reflection folds can significantly determine the ground fissure anomalies,with 6 reflection folds being the minimum.

关 键 词：覆盖次数 人工地震勘探 西安地裂缝 反射波 

分 类 号：P631.4[天文地球—地质矿产勘探]