基于不同高度异常交叉约束反演的航空磁法探测遗煤火区

Aeromagnetic Method for Detecting Residual Coal Fire Area Based on Cross Constraint Inversion of Different Height

煤矿采空区遗煤自燃过程中产生化学作用合成了高磁性的铁磁性矿物,表现为高磁异常。针对采空区遗煤自燃区的分布,利用探测高度越高越能有效突出更大深度自燃区的特点,来揭示不同深度的自燃区特征。建立不同高度航空磁法立体探测技术,采用交叉约束,实现不同高度航磁数据联合反演,进而获取自燃区的三维分布结构;结合围岩物性资料,从而确定采空区遗煤自燃区的具体分布范围。该方法可以提升不同深度场源的分辨率,更加准确地揭示深部火区的分布,为采空区遗煤自燃区治理及煤矿安全提供重要保障。

In the process of spontaneous combustion of residual coal,high magnetic ferromagnetic minerals are synthesized by chemical action,which shows high magnetic anomaly.In view of the distribution of spontaneous combustion zone of residual coal in goaf,the characteristics of spontaneous combustion zone with larger depth can be effectively highlighted by the higher detection height,so as to reveal the characteristics of spontaneous combustion zone at different depths.The three-dimensional detection technology of aeromagnetic method at different heights is established,and the joint inversion of aeromagnetic data at different heights is realized by cross constraint,so as to obtain the threedimensional distribution structure of spontaneous combustion zone.Combined with the physical data of surrounding rock,the specific distribution range of residual coal spontaneous combustion zone in goaf is determined.