摘要
对采自宁夏汝箕沟煤田上覆盖层的原岩样品在温度作用下的磁性变化进行了系统研究。通过分析煤火区不同燃烧阶段围岩的温度变化情况,对原岩样品进行了模拟“燃烧”试验,试验结果表明,岩石磁性在不同温度作用条件下存在明显差异,从而从岩石磁性的角度讨论了磁法勘探圈定煤田火烧区的可行性。最后,采用人机交互法对地面实测磁异常剖面进行反演,有效地圈定了煤火区着火点的位置及范围。
Systematic investigations were conducted on the rock samples collected from the Ruqigou coalfield in Ningxia. As the rock temperatures vary with the combustion degree, the authors made a serial of calefaction experiments on the rock samples. The results demonstrate that the rock magnetism varies with temperature. The feasibility of applying the magnetic method to detecting the underground coal fires was studied and,in addition,the human-computer interactive inversion algorithm was used to process the measured data. The inversion result fits the measured data well and can determine the combustion center and delineate the coal fire area effectively.
出处
《物探与化探》
CAS
CSCD
2007年第2期115-119,共5页
Geophysical and Geochemical Exploration
关键词
磁化率
磁化强度
磁法
煤火
susceptibility
magnetic method
magnetization intensity
coal fire
