小煤窑采空区的地面磁场观测结果及其初步推断  

Observation result and its preliminary deduction of ground geomagnetic field in gap of small coal pit

作　　者：赵从利[1] 姚同起[1] 张洪利[1] 沈文志[1] 

机构地区：[1]中国地震局地球物理研究所

出　　处：《地震地磁观测与研究》1998年第5期54-57,共4页Seismological and Geomagnetic Observation and Research

摘　　要：在神朔铁道神木至大柳塔段，为了解地下煤窑空洞与隧道情况，布设了６条测线，共计３８８个测点，进行了地磁总强度观测工作。根据观测数据，分析了测区的磁场分布特征。由此初步推断，测区东南部的Ｅ区负异常是由地下矿道引起的；测区中部的Ｄ区负异常也是有地下矿道的部分贡献；测区其他部分，由于存在地下浅层铁磁性物质与铁轨的严重影响，地下矿道的位置与走向需要进一步讨论。From Shenmu to Daliuta section along Shensuo railway,we set up 6 survey lines in order to understand the condition of underground coal pit and tunnel.There are 388 survey sites altogether and geomagnetic total intensity are observed.According to the observation data,the characteristics of geomagnetic field distribution are analyzed in the survey area.A preliminary deduction is:the negative anomaly of E area in southeast survey area is caused by underground mineral drive;the negative anomaly of D area in middle survey area is also partial contribution of underground mineral drive;the position and strike of underground mineral drive need a further discussion in other parts of the survey area because of serious effects of rail and ferromagnetic materials existing in underground shallow layer.

关 键 词：地磁观测 煤窑采空区 地面磁场 观测结果 

分 类 号：P318.6[天文地球—固体地球物理学]