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Dynamics of autonomous rock electromagnetic radiation measurement instrumentation

Remigiusz Mydlikowski Krzysztof Maniak
Bulletin of the Polish Academy of Sciences Technical Sciences | 2021 | 69 | 5 | e138567 | DOI: 10.24425/bpasts.2021.138567
Keywords electromagnetic fields EM receiver rock destruction dynamics of operation
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Abstract

The paper analyzes the operation of innovative composite measurement instrumentation for spontaneous electromagnetic emission. The designed receiver measures and records both components of the EM field emitted by rocks subjected to increased mechanical stress. The range of signals transmitted by the receiver system and its dynamics were determined. A receiver was used to observe electromagnetic signals generated during a hard coal sample crushing in laboratory conditions. Test results confirmed the high dynamic range of the system at 98 dB and the ability to observe signals over a range of frequencies up to 50 kHz. The experimental results confirm the signal bandwidth characteristic of coal mine EM field emission obtained in earlier studies. The constructed autonomous receiver can be used in mine workings as a complementary warning system for emerging mine hazards.
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Authors and Affiliations

Remigiusz Mydlikowski
1
ORCID: ORCID
Krzysztof Maniak
2
ORCID: ORCID
  1. Wroclaw University of Science and Technology, Faculty of Electronics, Photonics and Microsystems, ul. Janiszewskiego 11/17, 50-372 Wrocław, Poland
  2. National Institute of Telecommunications, ul. Szachowa 1, 04-894 Warsaw, Poland

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