中文摘要：

为了研究地裂缝空间展布特征和发育规律,在晋中盆地地表有地裂缝出露的区域开展三维地震勘探。地震数据采集采用端点激发束状观测系统进行,数据处理通过叠前时间偏移来提高地裂缝空间归位精度和成像效果,基于地震多属性分析特别是蚂蚁体追踪技术对地裂缝进行解释。研究区勘探面积4 km^2,共解释出地裂缝20条,其中主地裂缝11条,次级地裂缝9条。地裂缝在平面上呈线条状,走向以NEE向为主,总体与晋中盆地主干断裂走向一致,构造方向性非常明显,所解释的地裂缝有的裸露于地表,有的延伸到基岩面;在剖面上地裂缝两侧地层上下错移,落差为0-40 m;在空间上主要表现为地垒构造和地堑构造两种形式。研究区地表出露的5条地裂缝,有4条在本次勘探中被验证,这表明三维地震勘探在探测地裂缝地质灾害方面是一种有效的方法。

英文摘要：

In order to study the spatial distribution and development of ground fissures,3D seismic exploration was carried out for the area with ground fissure outcroppings in Jinzhong Basin. Data was acquired by using shooting-off-end swath acquisition-geometry survey,processed by pre-stack time migration to improve the accuracy of the fissures space and the effect of image,and interpreted for ground fissures based on the seismic multi-attribute analysis,especially the ant-tracking technique. The total area of the studied district are 4 km^2,and 20 ground fissures were interpreted with 11 principal ground fissures and 9 secondary ground fissures. Some of those ground fissures were interpreted as the outcrop on the surface,while some dip all the way down to the bedrock. The ground fissures are line-like distributed from plane view with a dominant orientation of NEE. In general,they have the same direction as the major faults in Jinzhong Basin and have the distinct structural direction. From the section view,the strata on both sides of ground fissures displaced to each other with a throw of 0–40 m. In 3D space,they are horsts and grabens. 4 out of 5 ground fissures that outcrop on the surface in the studied area were confirmed by this prospecting,which indicates that the 3D seismic prospecting is an effective approach in ground fissure detection.