三维地震勘探技术在宁夏任家庄煤矿的应用

Application of 3D seismic exploration technology in Renjiazhuang Coal Mine of Ningxia

勘查区共完成三维地震勘探试验物理点132个,收集了4组反射波,通过反射波组研究,解译了煤层深度及起伏形态和断层分布。控制了波幅大于5 m的褶曲,主要为三道沟背斜和黄草沟向斜;查明了三煤、五煤和九煤落差≥5 m的断层,并对落差3~5 m的断点尽可能进行了解释,全区共解释断层29条,新发现断层23条。控制了新生界厚度,为130~240 m,自西南向东、北逐渐变厚。查明了煤层的底板形态,总体为走向近SN、倾向E的单斜。控制了煤层的底板标高(+400~+1090 m)。未发现其他地质异常现象。

A total of 132 physical points of 3D seismic exploration have been completed in the exploration area,and 4 groups of reflection waves have been collected.Through the study of reflection wave groups,the coal seam depth,undulating shape and fault distribution have been interpreted.The folds with amplitude greater than 5 m are controlled,mainly including Sandaogou anticline and Huangcaogou syncline.The faults with a drop of≥5 m in coal seams 3,5 and 9 have been identified,and the breakpoints with a drop of 3~5 m have been interpreted as far as possible.A total of 29 faults have been interpreted in the whole area,and 23 new faults have been found.It controls the thickness of Cenozoic,which is 130~240 m,and gradually thickens from southwest to east and north.The floor shape of the coal seam is found out,which is generally monoclinal with a strike close to SN and a dip of E.The floor elevation of the coal seam is controlled,which is+400~+1090 m.No other geological anomalies are found.