The bibliographical information have shown that the full digital high density 3D seismic prospecting technology can improve vertical and horizontal resolution of seismic waves, further enhance prospecting result accuracy. But the comparison of prospecting re-sults from analog geophone and digital geophone ( high density) usually carried out under different acquisition times, different folds and different surface element grids, thus the comparison will not be scientific because of differentials in time, space, shot and receiving conditions. In allusion to this issue, using same shot and receiving conditions and same processing procedure and parameters, carried out seismic data acquisition and processing through both analog geophone and digital geophone to compare prospecting results of the both. The actual data have shown that under the same conditions, the single-shot record from digital geophone comparing with from analog geophone has wider frequency response, larger dynamic range. Using same processing procedure and parameters, digital geo-phone has stronger weak signal resolving power than analog geophone on time section, and can effectively broaden target reflection wave band and enhance master frequency. In addition, digital geophone acquired data include more low frequency effective information in fa-vor of lithological analysis.%文献资料表明,全数字高密度三维地震勘探技术能够提高地震波的纵、横向分辨率,进而提高煤田地震勘探成果的精度.但模拟检波器与数字检波器(高密度)的勘探效果的对比,往往是在不同采集时期、不同覆盖次数、不同面元网格下进行的,这种对比因时间、空间、激发及接收条件存在差异则不具备科学性.针对这一问题,采用相同的激发、接收条件及相同的处理流程和参数,对模拟检波器与数字检波器进行地震数据采集和处理,以比较两者之间的勘探效果.实际资料表明:在相同条件下,数字检波器比模拟检波器采集的单炮记录频率响应宽、动态范围大;采用相同的处理流程与参数,时间剖面上,数字检波器比模拟检波器具有较强的弱小信号分辨能力,而且能有效拓宽目的层反射波频带和提高主频;数字检波器采集的资料包含较多的低频有效信息,有利于岩性分析.
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