物探在不良地质体探测中的应用
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摘要
在工程勘探、施工过程中,经常遇到采空区、巷道、软弱层等不良地质因素,对上述不良地质现象,物探是一种有效的勘探方法,尤其是地震映像法更是一种较为简便有效的探测手段。但地下介质的复杂性决定了野外地震映像法所采集的波场资料的复杂性,以及资料解释和异常判别的不确定性。通过数值模拟技术,有效地模拟了典型模型的地震映像剖面。模拟剖面可以看到显著的物探异常,有效地反映了复杂结构中的波场形态和特征,对提高实际工作的探测精度具有一定的指导意义。工程实例分析表明,地震映像法可以准确地判定异常的空间位置,能够满足生产需要。
In railway exploration process,we are often caught by unfavorable geological body such as goaf,roadway,softlayer,etc.Under these unfavorable geological conditions,the geophysical method is an effective exploration method.In particular,seismic imaging method is a simple and effective means of detection.The complexity of subsurface collection determines the complexity of the seismic wave field.The difficult of data interpretation and anomaly discrimination leads to the method fails sometimes.With the numerical simulation method,we effectively simulated the seismic imaging profile of actual physical parameter.On modeling profile,we can see a significant geophysical anomaly,effectively reflecting the complex structure of the wave field in the shape and characteristics.It has a certain significance to the interpretation of actual work.The practical example shows that seismic imaging method can accurately determine the abnormal spatial location,and able to meet the production needs.
In railway exploration process,we are often caught by unfavorable geological body such as goaf,roadway,softlayer,etc.Under these unfavorable geological conditions,the geophysical method is an effective exploration method.In particular,seismic imaging method is a simple and effective means of detection.The complexity of subsurface collection determines the complexity of the seismic wave field.The difficult of data interpretation and anomaly discrimination leads to the method fails sometimes.With the numerical simulation method,we effectively simulated the seismic imaging profile of actual physical parameter.On modeling profile,we can see a significant geophysical anomaly,effectively reflecting the complex structure of the wave field in the shape and characteristics.It has a certain significance to the interpretation of actual work.The practical example shows that seismic imaging method can accurately determine the abnormal spatial location,and able to meet the production needs.
引文
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[3]张致付,程志平.物探方法在探测岩溶构造中的应用[J].桂林工学院学报,2003,23(1):41-45.
[4]Alford R M.Accuracy of finite difference modeling of the acoustic wave equation[J].Geophysics,1974,39(6):834842.
[5]董良国,马在田,曹景忠等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411-419.
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