三维地震在煤矿确定采空区范围的应用

Application of 3D seismic in determining the extent of goaf in coal mine

煤层采空及顶板遭受破坏后,地震时间剖面必然反映出反射波组的能量变弱、中断或消失,同时煤层顶部的不规则破坏会产生不同的低频干扰。这些规律可以作为识别采空区是否存在的标志。以侯村矿为例,通过三维地震勘探确定煤窑采空区分布范围和采空区及其覆岩现状,了解分析巷道的分布情况。

After the damage of coal seam goaf and the roof, the seismic time profile must reflect the weakening, interruption or disappearance of the reflected wave group, and the irregular damage at the top of the coal seam would produce different low frequency interference. These rules can be used as a marker to identify the existence of a goaf. Houcun Mine was taken as an example, the distribution range of coal mine goaf and the status of goaf and overburden were determined through 3 D seismic exploration, and the distribution of roadway was analyzed.