One-dimensional constrained inversion study of TEM and application in coal goafs’ detection
| Autor: | Liu Yaoning, Si Yuanlei, Li Maofei, Guo Weihong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
QE1-996.5
010504 meteorology & atmospheric sciences business.industry 1d tem forward simulation 0211 other engineering and technologies Mineralogy Inversion (meteorology) the least squares method Geology 02 engineering and technology Environmental Science (miscellaneous) induced emf 01 natural sciences constrained inversion Physics::Geophysics General Earth and Planetary Sciences Coal business transient electromagnetic method 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Open Geosciences, Vol 12, Iss 1, Pp 1533-1540 (2020) |
| ISSN: | 2391-5447 |
| Popis: | Transient electromagnetic method (TEM) is often used in urban underground space exploration and field geological resource detection. Inversion is the most important step in data interpretation. Because of the volume effect of the TEM, the inversion results are usually multi-solvable. To reduce the multi-solvability of inversion, the constrained inversion of TEM has been studied using the least squares method. The inversion trials were performed using two three-layer theoretical geological models and one four-layer theoretical geological model. The results show that one-dimensional least squares constrained inversion is faster and more effective than unconstrained inversion. The induced electromotive force attenuation curves of the inversion model indicate that the same attenuation curve may be used for different geological conditions. Therefore, constrained inversion using known geological information can more accurately reflect the underground geological information. |
| Databáze: | OpenAIRE |
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