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岩溶陷落柱是煤田开采中一种常见的地质灾害体.为研究利用反演方法识别陷落柱,根据煤矿陷落柱的地质特征,设计了整体塌落型和垮落型两类陷落柱地质模型,并通过正演模拟获得了相应的地震剖面.通过对正演剖面进行声波阻抗反演,发现整体塌落型陷落柱的波阻抗值明显高于煤层,垮落型陷落柱柱体与煤层接触的部位的波阻抗值略高于煤层,并且柱内地层存在沉降现象.将这一结论应用到实际三维地震采区,发现与实际资料的吻合度较好,陷落柱的位置和规模在反演上有较清晰的显示,能够识别直径小于50 m的小型陷落柱异常.
Karst collapse column is a kind of common geological disasters in coalfield mining.In order to study the identification of the collapse column by the inversion method, according to the geological characteristics of the coal mine collapse column, the two types of collapse and collapse type geological models are designed, And the corresponding seismic profiles are obtained through forward modeling.The acoustic impedance inversion of the forward section shows that the wave impedance values of the overall collapse type collapse column are obviously higher than those of the coal seam and the collapse type collapse column and the coal seam The wave impedance value of the site is slightly higher than that of the coal seam, and the formation in the column has subsidence phenomenon.This conclusion is applied to the actual 3D seismic mining area, and the coincidence degree with the actual data is good, the position and scale of the collapse column are inversed Clearer display of minor collapse column anomalies smaller than 50 m in diameter.