中文摘要：

探讨了高密度电法、高精度重力法、地震反射法和主动源面波法在浅覆盖红层碎屑可溶岩塌陷地区对土洞和浅部溶洞的探测效果.通过各方法与动力触探、钻探资料的对比发现：地震反射法能评价潜在土洞的大小和埋深,在地震反射时间剖面上呈现同相轴错断、缺失的特征.不同极距的高密度联剖曲线正交点点位能评价溶洞的发育方向;反演的横波低波速段和电阻率剖面低阻圈闭区、＂V＂型区与溶洞的顶底板埋深吻合;在同等探测深度情况下,小点距的高密度电法具有更高的分辨率.高精度重力布格曲线上的＂V＂型低值区能定性评价潜在土洞和溶洞的发育.在红层塌陷区进行地球物理调查时,对土洞的探测推荐使用地震反射法和高精度重力法组合,对浅部溶洞的探测推荐使用高密度电法、主动源面波和高精度重力法组合.

英文摘要：

The effectiveness of high density resistivity method,high precision gravity method,seismic reflection method and active source surface wave technology to detection of soil cave and karst cave are discussed in red bed area.Through the comparison of various methods with the data of dills and dynamic sounding we found that seismic reflection method can evaluate the size and depth of potential soil hole,with features of phase axis missing in the seismic reflection profiles.Orthogonal point position of high density combined curve with different distance reflects the development direction of karst cave.It is also found lower shear wave velocity and lower resistivity area are fitting well with dirlls which show the depth of roof and floor of karst cave,and a smaller point of high density resistivity method shows higher resolution in the condition of same probing depth.The development of soil cave and karst caves can be evaluated qualitatively through gravity curve,with features of＂V＂type and low gravity value.The combination of reflection method and high precision gravity method is recommend in the detection of soil cave while combination of high density resistivity method,active source surface wave technology and high precision gravity method is recommend in the detection of kasrt cave.