电性源瞬变电磁Born近似反演及其在煤田采空区探测中的应用  

Electrical Source Transient Electromagnetic Born Approximation Inversion and Its Application in Coalfield Gob Detection

作　　者：庞贵艮 李雄伟 侯彦威 PANG Guigen;LI Xiongwei;HOU Yanwei(Baode Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Xinzhou 036600,China;CCTEG Xi′an Research Institute(Group)Co.,Ltd.,Xi′an 710077,China)

机构地区：[1]国能神东煤炭集团有限责任公司保德煤矿,山西忻州036600 [2]中煤科工西安研究院(集团)有限公司,西安710077

出　　处：《煤炭技术》2023年第12期149-151,共3页Coal Technology

摘　　要：以电性源瞬变电磁装置为研究对象,在虚拟波场条件下基于Born近似反演实现煤田采空区探测,探测结果既能够获得地层的连续起伏与错断的形态、定位采空区的位置,又能够获得地下空间的电性分布特征,从而实现定性与定量解释。通过采空区理论模型计算,可以获得采空区的边界、煤层的埋深,与地层的电性分布;通过对实测数据的处理,结果表明可以有效地提供含水采空区的位置、地层的形态以及地下的电性分布特征,与煤层地质信息的对比可知,基于电性源瞬变电磁Born近似反演解释方法可以准确得到煤层开挖后含水采空区电性分布、边界信息以及几何特征。Taking the transient electromagnetic device of electrical source as the research object,the goaf detection in coal field is realized based on Born approximate inversion under the condition of virtual wave field.The detection results can not only obtain the continuous fluctuation and discontinuity of strata,locate the location of goaf,but also obtain the electrical distribution characteristics of underground space,to realize qualitative and quantitative interpretation.The boundary of the goaf,the depth of the coal seam and the electrical distribution of the strata can be obtained by calculating the theoretical model of the goaf.By processing the measured data,the results show that the location of water-bearing gob,formation morphology and underground electrical distribution characteristics can be effectively provided.Compared with the geological information of coal seam,the electrical distribution,boundary information and geometric characteristics of water-bearing gob after coal seam excavation can be accurately obtained based on the transient electromagnetic Born approximate inversion interpretation method of electrical source.

关 键 词：瞬变电磁 波场变换 Born近似反演 电性源 

分 类 号：P631.3[天文地球—地质矿产勘探]