浅埋煤层覆岩含水层富水性探测联合反演研究

Study on Joint Inversion in Water-rich Probing of Shallow Buried Coal Seam Overburden Aquifer

浅埋煤层开采过程中,顶板裂隙带容易将顶板上方含水层导通,造成顶板涌水量增大,影响煤矿安全生产。为了探查煤层顶板上方岩层的富水性,本文采用10 m×40 m高密度电法探测网对研究区进行岩层富水区探查。由于相邻测线的距离为4倍的极距,相邻测线之间存在探测的盲区。为了解决这一问题,本文将每条探测线的数据增加Y方向的坐标点,使二维数据转换成三维数据,采用res3d软件进行反演处理,成功解决两线之间的盲区问题。与二维数据处理相比,三维反演不仅解决了测线之间的盲区问题,而且可以预防局部收敛造成的假异常,提高了物探探测的精度。

During the mining of shallow coal seams,the roof fissure zone easily conducts the aquifer above the roof,causing the roof water gushing to increase and affecting the safe production of coal mines.To explore the water richness of the rock above the coal roof,a 10 m×40 m high-density electrical detection network is used to explore the water rich area of the rock in the study area.Since the distance between adjacent survey lines is 4 times the polar distance,there is a detection blind zone between adjacent survey lines.The data of each detection line is added with the coordinate point in the Y direction,so that the two-dimensional data is converted into three-dimensional data,and the res3d software is used for inversion processing,which successfully solves the problem of the blind zone between the two lines.Compared with two-dimensional data processing,three-dimensional inversion not only solves the problem of blind areas between survey lines,but also prevents false anomalies caused by local convergence,which improves the accuracy of geophysical exploration.