【摘要】 用三维地震勘探查明了淮南矿区多个陷落柱的大小及分布范围,但柱体内赋水状况不明,极大地影响了矿井的安全生产,决定采用可控源音频大地电磁法和电磁波法对陷落柱的富水性进行探查。研究表明,地层电阻率的大小与富水程度具有一定的相关性,低电阻率值对应于强富水,高电阻率为弱富水或不富水。依据陷落柱不同深度的电阻率水平截面和纵向电阻率剖面对陷落柱的富水性作出分析,探测结果显示:在陷落柱的南部及靠近断层的局部地段富水较强,即柱体内仅局部富水。在地面施工少量验证钻孔,探测结果与钻探资料吻合较好,为煤矿陷落柱的探查提供了一种新的综合物探方法。更多还原

【Abstract】 The sizes and distribution range of collapse columns existing in Huainan mining area have been found out by 3-D seismic exploration,but the water enrichment conditions inside the columns are not clear,which greatly influences the safety mining.In this paper,the Controlled-Source Audiomag-netotellurics and Electromagnetic Wave method were adopted to prospect the water abundance of col-lapse columns.The result shows that the apparent formation resistivity has a certain correlation with the water abundance,that is,low resistivity is corresponding to abundant water,while high resistivity cor-relates with low or no water abundance.Meanwhile,the water enrichment of collapse column are ana-lyzed according to the horizontal and longitudinal apparent resisitivity profiles in different depth,and the detection results show that the water abundance in the south of collapse column and partial areas near the faults are relatively large,namely there only exists partial water enrichment in the collapse column.A small amount of validation drillings on the ground have been constructed,and the detection results correspond well with those of drilling,which provides a new integrated geophysical method for the prospecting of collapse column in coal mine.更多还原