论文部分内容阅读
钟山煤矿位于南京东郊24公里,地理坐标位置东径118°59′14″,北纬31°58′36″。磁偏角理论值为北偏西4°。但磁偏角值在井田东翼为4°左右,在井田西翼则磁偏角值异常。附表(1)为在无磁性物干扰的巷道内实测的部分数据。为什么在同一矿井中东西两翼会出现异常的磁偏现象呢?我们认为这是由于在煤层和其直接顶底板的岩层中,含黄铁矿结晶体及黄铁矿结核造成了磁偏角的异常。
Zhongshan Coal Mine is located in the eastern outskirts of Nanjing, 24 kilometers east of the geographic coordinates of 118 ° 59’14 “, latitude 31 ° 58’36”. Magnetic declination theoretical value north west 4 °. However, the declination value is about 4 ° in the east wing of Ida and the magnetic declination value is abnormal in the west wing of the mine field. Schedule (1) for the non-magnetic interference measured in the roadway part of the data. Why is there anomalous magnetic bias in the east and west wings in the same mine? We think this is due to the abnormal magnetic declination in pyrites and pyrite nodules in the coal seam and its direct roof and floor strata.