三维地震物探技术在宁夏金凤煤矿三分区勘探中的应用研究

Application of three-dimensional seismic geophysical exploration technology in exploration of Ningxia Jinfeng Coal Mine

结合金凤煤矿二、四分区已有的地震勘探资料,通过踏勘和理论分析论证,针对复杂的地质条件和开采技术,对本矿区三分区实施了三维地震试验方案,采用地震解释组合体软件(IESX)、可视化软件(GeoViz)以及地质绘图软件(CPS3)对原始数据进行处理和分析,认为T12、T15、T18波主要是由十二、十五、十八号煤层引起的复合反射波,连续性好,易连续对比追踪。通过三维地震异常解释断点160个,解释断层12条,其中正断层11条;异常显示煤系地层总体形态为背斜构造,轴部位于勘探区中部,背斜构造轴向NNE转近NS,东翼较陡,西翼稍缓。因此,通过对三维地震勘探可有效解释矿区褶皱、断层构造、煤层深度、起伏形态等特征,可为矿井开发建设提供较为可靠的地质资料。

Combined with the existing seismic exploration data of the second and fourth districts of Jinfeng Coal Mine,through reconnaissance and theoretical analysis and demonstration,aiming at the complex geological conditions and mining technology,a three dimensional seismic test scheme is implemented for the third district of the mining area.The original data are processed and analyzed by using seismic interpretation combination software(IESX),visualization software(GeoViz)and geological mapping software(CPS3).It is considered that T12,T15 and T18 waves are mainly composite reflected waves caused by coal seams No.12,15 and 18,with good continuity and easy continuous comparison and tracking.Through 160 breakpoints of 3D seismic anomaly interpretation,12 faults are interpreted,including 11 normal faults.The anomaly shows that the overall shape of coal measure strata is anticline structure,and the axis is located in the middle of exploration area.The axial NNE of anticline structure turns close to NS,the east wing is steep and the west wing is slightly slow.Therefore,3D seismic exploration can effectively explain characteristics of folds,fault structures,coal seam depth and undulation shape in the mining area,and to provide more reliable geological data for mine development and construction.