井中三分量磁测方法与效果初探

The method of borehole three-component magnetic survey and its effective originally exploration

以往井中三分量磁测资料处理方法主要借鉴地面磁测方法，磁测资料没有充分利用，使解释结果简单，解释者任意性强，误差较大，不能为磁性矿床的勘探提供翔实的解释结果．在工作实践的基础上，本文介绍了对磁铁矿勘探孔进行井中三分量磁测来发现盲矿的方法，重点阐述了利用井中磁异常矢量图进行半定量解释的理论和方法，详细论述了井中三分量测量数据处理及图件的制作过程，并举实例说明图件的处理结果和主要利用矢量图的收敛、发散特征来推测磁性矿体的“矿头”、“矿尾”，可以看出利用本方法来探测井底和井旁盲矿的效果明显，结论正确，解释过程和结果方便直观，易于理解，大大提高了工作效率，一口千余米深的钻孔资料处理和解释仅需1～2小时即可完成．测量解释结果经过地质验证基本正确，方法可行。

The data-processing method of the borehole three-component magnetic survey mainly modeled ground magnetic survey method before, the magnetic survey material was not fully used, making the explalnation simply, expositors free strongly, and the errors largerer, further more, it could not provide the detailed interpretative result for magnetic ore exploration. At the basic of working practice, this article introduced the method whitch found out blind ore using the borehole three-component magnetic survey,emphasized using magnetism unusual vector chart carring on the theory and the method of half quantitative interpretation, and treatised detailedly the data-processing of the borehole three-component survey and the charts, To prove out the graphic-processing result , we mainly used the vector chart whitch was convergence or radiation to extrapolate ＂the ore head＂, ＂the ore tail＂of magnetic ore body, It was obvious to discover the nearby and the bottom blind ore of the well ,and the conclusion was correct, the course of explanation and the result was direct-viewing and easy to understand, greatly enhanced the working efficiency, However ,we only need 1-2 hours to process and explaine for datum a thousand meter deep drilled hole . The explained result whitch was correct has been basiclly confirmed by geology,and the method was feasible.