厚煤层多波地震响应及联合反演技术应用研究

Application of Multi-wave Seismic Response and Joint Inversion in Thick Coal Seam

为确保厚煤层工作面中隐伏构造的精准探测,保障矿井安全生产,通过联合体波双插地震反演成像和槽波一步反演成像,实现厚煤层全空间多波联合反演。开展了三维有限元数值模拟,建立了厚煤层中隐伏构造的地震勘探模型,搭建V_(P)/V_(S)模型参数进行多波联合反演,断层反演结果与模型位置吻合。现场试验表明:通过在双巷和切眼中布置检波器并在煤层中激发,震源激发后可获取体波和槽波的地震响应特征,结合搭建的V_(P)/V_(S)模型参数完成多波联合反演,精准定位隐伏构造位置,经钻孔与实际回采揭露,隐伏构造位置与反演结果一致。

To ensure the accurate detection of hidden structures in the thick coal seam working face and to guarantee the safe production,the multi-wave joint inversion of the thick coal seam in full space is realized by combining body wave dual-interpolation seismic inversion imaging and in-seam wave one-step inversion imaging.By finite element 3D numerical simulation,we established a seismic exploration model for hidden structures and V_(P)/V_(S) model parameters for the multi-wave joint inversion.The fault inversion results match the model location.The field test shows that,through arranging geophones in the double roadways and cutting holes,the seismic response characteristics of body wave and in-seam wave can be obtained after the seismic source is excited.Combined with the parameters of the V_(P)/V_(S) model,the multi-wave joint inversion can be completed and the location of the hidden structures can be located.Drilling and actual mining reveal that the location of the hidden structure is consistent with the inversion results.