This paper introduces the curvature gradient tensor matrix (CGTM) method to identify the edge of burnt coal areas more accurately and to interpret the magnetic anomaly in more detail. The characteristics of CGTM of the magnetic anomaly in the burnt coal areas are discussed and analyzed. The characteristics indicate that the larger and smaller eigenvalues of CGTM can be used to identify the burnt coal areas and normal areas of the coalfield. In the model tests, the Theta map and vertical derivative edge detection methods were compared with the CGTM. The results demonstrate that the CGTM method is superior in edge detection of geological sources. The effectiveness of the method was also demonstrated. Finally, the method was applied to interpretation of the magnetic anomaly of Wuda coalfield. The results obtained by CGTM method had good agreement with other known geological data. It shows that the method could accurately and effectively identify the edge of coalfield fire areas and normal areas, and is useful for interpreting the magnetic anomaly of coal fire areas.
YAN Jianbo
,
ZHOU Wenna
. Application of Curvature Gradient Tensor Matrix in Magnetic Anomaly of Burnt Coal Area[J]. Science & Technology Review, 2014
, 32(31)
: 75
-79
.
DOI: 10.3981/j.issn.1000-7857.2014.31.011
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