基于蚂蚁追踪技术的三维地震精细解释研究——以溧阳市土包山地面塌陷区为例

3 D Seismic Fine Interpretation Based on Ant Tracking Technique:Tubaoshan Ground Subsidence in Liyang City as an Example

地面塌陷是地下矿产采空区常见的地质灾害,实践中可采用三维地震勘探来勘查塌陷区地质情况。针对研究区存在反射波能量弱、分辨率低等问题,常规解释方法难以保证该区第四纪薄地层、老坑回填土边界、采空区及井下巷道等的解释有效性,在三维地震精细解释中采用蚂蚁追踪技术,利用蚂蚁体增强异常边界特征,提高横向不连续地质体的识别效果。从蚂蚁体剖面和沿层切片上综合分析,识别塌陷区老采坑底界、采空区边界范围以及部分巷道。该技术增加了地质目标纵、横向分辨率,提高了地震解释精度,较好地解决了第四纪薄地层及回填土的反射波能量弱、分辨率有限的问题;识别了地下部分巷道,为今后井下巷道的解释识别提供参考。

Ground subsidence is a common geological hazard in underground mining goaf.In practice,3D seismic exploration can be used to investigate the geology of the subsidence areas.It is difficult to ensure the interpretation validity of Quaternary thin strata,old pit backfill boundaries,goaf,and underground roadways in the study area with conventional methods,due to weak reflected wave energy and low resolution.Ant tracking technique was adopted in the 3D seismic fine interpretation,using ant body to enhance the anomaly boundary features and improve the identification of lateral discontinuous geological bodies.Comprehensive analysis of the ant body profile and along-layer slices identified the bottom boundary of the old pit in the subsidence area,the boundary range of the goaf,and part of roadways.This technique increased the vertical and horizontal resolution of geological targets,improved the precision of seismic interpretation,and better solved the problems of weak reflected wave energy and limited resolution of Quaternary thin strata and backfill;it also identified some roadways,which provided a reference for the interpretation and identification of underground roadways in the future.