【摘要】 在山地、沙漠和戈壁等地区,地形起伏严重、风化层变化剧烈,静校正问题非常严重。在这种情况下,进行表层调查是解决静校正问题的一种有效手段。根据小折射资料进行表层调查需要专门采集小折射资料。为此提出了一种基于广义相遇法,使用大炮资料进行表层调查的方法:对广义相遇法的时间深度公式进行简化,求出每组炮检对对应的时间深度值;将每个检波点位置的时间深度值进行叠加,求出该检波点处的叠加时间深度值;求取折射层速度;求出每个检波点位置的折射层厚度。通过理论模型试验,该算法可以很好地求出表层的深度和速度,解决了静校正问题。更多还原

【Abstract】 In mountain,desert and Gobi areas,the hypsography is serious and static correction is an ill-posed problem.Under this condition,the research of the near-surface investigation is a available method.If we use the data of small refraction,we should correct the data of small refraction in addition.So a method based on GRM which uses the data of big gun is opposed.The approach is as follows:1、To predigest the time-depth equation of GRM,and request the time-depth value of every receiver to two shots;2、To stack the time-depth values of every receiver,and request the stacking time-depth value of every receiver;3、To request seismic velocities in refractors;4、To request the depths of refraction in every receiver.The method has been proved effective by model and field data.It can resolve the problem of static.更多还原