二维瞬态瑞雷波勘探及其在采空区探测中的应用
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摘要
多次覆盖反射波勘探是地震勘探中精度高、应用广的方法之一,由于浅层勘探的反射波信号容易被面波、声波干扰,使得该方法在进行浅部探测时不能取得较好的效果。而瞬态瑞雷波勘探在浅层勘探中具有较高的探测精度,其结果是探测排列下岩土体速度的综合反映。鉴于此,本文采用多次覆盖采集的滚动采集模式,将一维的瞬态瑞雷波勘探变为二维,从而得到测线下岩土体剪切波速度的二维分布。通过与浅层地震反射波勘探进行对比分析,结果表明,在浅层采空区勘探中,二维多道瞬态瑞雷波勘探具有较高的分辨率。因此,在浅层地震反射波勘探过程中,如果面波发育,可进行浅层地震反射波与瞬态瑞雷波联合勘探,以提高勘探结果的准确性。
The reflection wave exploration with multi-coverage is one of the high accuracy and wide application methods in the detection of goaf.As the shallow reflection wave signal is easily disturbed by surface wave and acoustic wave,the good effect for shallow exploration couldn’t be obtained by the method.The shallow exploraton with transient Rayleigh wave is of the high detection accuracy,and the effect of the detection array is the comprehensive reflection for the velocity in rocks and soils.The scrolling multi- channel transient acquistion has been done,which turns the one-dimensional transient Raleigh wave exploration into two-dimensional one,and the two-dimensional velocity distribution of rocks and soils under the survey line is achieved.Through comparing with the shallow seismic reflection wave exploration,the results indicate that the scrolling multi-channel transient Rayleigh wave acquisition is of the high resolution.In the process of the exploration with shallow seismic reflection,if the surface wave has the apparent development,the combination exploration could be carried out by using the shallow reflection wave and the multi-channel transient Rayleigh wave to obtain the exact results.
The reflection wave exploration with multi-coverage is one of the high accuracy and wide application methods in the detection of goaf.As the shallow reflection wave signal is easily disturbed by surface wave and acoustic wave,the good effect for shallow exploration couldn’t be obtained by the method.The shallow exploraton with transient Rayleigh wave is of the high detection accuracy,and the effect of the detection array is the comprehensive reflection for the velocity in rocks and soils.The scrolling multi- channel transient acquistion has been done,which turns the one-dimensional transient Raleigh wave exploration into two-dimensional one,and the two-dimensional velocity distribution of rocks and soils under the survey line is achieved.Through comparing with the shallow seismic reflection wave exploration,the results indicate that the scrolling multi-channel transient Rayleigh wave acquisition is of the high resolution.In the process of the exploration with shallow seismic reflection,if the surface wave has the apparent development,the combination exploration could be carried out by using the shallow reflection wave and the multi-channel transient Rayleigh wave to obtain the exact results.
引文
[1]牛建军,张晓培,杜立志.影响瞬态瑞雷波勘探精度的因素探讨[J].矿业研究与开发.2006,26(1):50～51.
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[3]牛建军,苏亚志,郑作栋.瑞雷波勘探在地下洞穴探测中的应用[J].世界地质,1997,16(2):79～81.
[4]Park C.B.Millker R.D.,J Xia.Multichannel analysis of surface waves[J].Geophysics,1999,64(3):800～808.
[5]靳聚盛.地震勘探方法圈定老窑采空区[J].中国煤田地质,1998,10(3):71.
[6]熊章强,方根显.浅层地震勘探[M].北京:地震出版社,2002.
[7]杨成林.瑞雷波勘探[M].北京:地质出版社,1993.
[2]杜立志.瞬态瑞雷波勘探中的数字处理技术研究[D].长春:吉林大学,2005,13～15.
[3]牛建军,苏亚志,郑作栋.瑞雷波勘探在地下洞穴探测中的应用[J].世界地质,1997,16(2):79～81.
[4]Park C.B.Millker R.D.,J Xia.Multichannel analysis of surface waves[J].Geophysics,1999,64(3):800～808.
[5]靳聚盛.地震勘探方法圈定老窑采空区[J].中国煤田地质,1998,10(3):71.
[6]熊章强,方根显.浅层地震勘探[M].北京:地震出版社,2002.
[7]杨成林.瑞雷波勘探[M].北京:地质出版社,1993.
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