Transient electromagnetic characteristics of coal seams intruded by magmatic rocks

The intrusion of magmatic rocks into coal seams affects the coal quality and leads to unforeseen hazards in safety of the coal mines' production. This paper summarizes the mechanism of magmatic rocks intruding into coal seams, depicts the electromagnetic characteristics of the coal seams intrud...

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Bibliographic Details
Published in:PloS one 2022-02, Vol.17 (2), p.e0263293-e0263293
Main Authors: Yang, Yang, Xiong, Bin, Peng, Sanxi, Liu, Siqin, Chen, Hanbo, Zhang, Tianyu
Format: Article
Language:English
Subjects:
Analysis
Coal
Coal - analysis
Coal mines
Coal Mining
Computer and Information Sciences
Data processing
Earth science
Earth Sciences
Electrical resistivity
Electromagnetic Phenomena
Electromagnetic properties
Electromagnetism
Engineering and Technology
Humans
Intrusion
Isotopes
Lava
Methods
Mining accidents & safety
Occupational safety
Physical properties
Physical Sciences
Rocks
Soil - chemistry
Volcanic Eruptions
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Summary:The intrusion of magmatic rocks into coal seams affects the coal quality and leads to unforeseen hazards in safety of the coal mines' production. This paper summarizes the mechanism of magmatic rocks intruding into coal seams, depicts the electromagnetic characteristics of the coal seams intruded by magmatic rocks, briefly describes the characteristics of transient electromagnetic method (TEM), and introduces the method of detection by TEM and the data processing steps. Then, the effectiveness of TEM in detecting the ranges of the coal seams intruded by magmatic rocks is theoretically analysed. It is observed that after the intrusion of magmatic rocks in the coal seams, the electromagnetic characteristics (secondary field potential and resistivity) will be dramatically affected, namely high secondary field potential and low resistivity. For experimental verification purposes, this study selects the test project of the Tongxin Minefield in the Datong Coalfield in Shanxi, China as an example, and the accuracy for the detection of the ranges of the coal seams intruded by magmatic rock using TEM is successfully verified.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0263293