利用地震波勘探方法探测小煤矿采空区

摘要

通过设计物理模型,实现对小煤矿采空区的数值模拟研究,分析了小窑采空区产生的地震响应在地震时间剖面的反射波特征.发现小范围采空区在地震时间剖面的响应是反射波组同向轴错断,大面积采空区在地震时间剖面的响应表现为了煤层同相轴的“类向斜特征”.对山西晋城和洪洞地区两个煤矿采空区进行实地探测研究,都取得较好的应用效果.%Nowadays, goaf in the small coal mine( GSCM)is dangerous to resources integrated mining. Therefore, it is important to detect this kind of GSCM with suitable seismic geophysical method. In this paper, numerical simulation of GSCM was conducted on the basis of model design, and the response characteristics of GSCM in seismic section were analyzed. It is discovered that the reflection seismic waves phase axis is discontinuous in seismic section when the scale of GSCM is small, whereas the reflection seismic waves phase axis assumes " pseudosyncline" feature when more GSCM are connected together. Two cases of GSCM in Jinchen and Hongtong of Shanxi Province were studied, with satisfactory result achieved.