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Bulletin of Engineering Geology and the Environment

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01-01-2024 | Original Paper

Study on electric potential response’s spatial distribution characteristics to damaging localization evolution of gas-bearing coal under load

Authors: Yue Niu, Enyuan Wang, Zhonghui Li, Baolin Li, Feng Gao, Xianfeng Liu, Zhizhen Zhang, Qi Deng, Zhaoxi Long, Mingfu Wang, Jiali Wang, Liaoyuan Gao, Xin Zhang

Published in: Bulletin of Engineering Geology and the Environment | Issue 1/2024

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Abstract

For mining engineering and geological engineering, the deformation and fracture of coal and rock are the essential causes of dynamic disasters. In this paper, the loading experimental system was established on gas-bearing coal, to study the internal relationship between the spatial distribution of EP and the development process of damaging localization on coal mass. The results indicated the temporal response of EP signal could reflect the stress state and damage degree of gas-bearing coal, showing the precursor feather when coal mass failed. Particularly, when the stress dropped suddenly, the EP signal has a sudden mutation, and the acoustic emission (AE) signal suffered the pulsed increase, while the crack grew and expanded rapidly. Furthermore, when local severe damage occurs inside the coal mass, there was abnormal EP spatial distribution with high-value or dense contours in these zones, where simultaneously AE rupture events frequently occurred, and cracks expanded and gathered. The characteristics of EP spatial distribution can reveal the development process of coal mass damaging localization. Meanwhile, the mentioned zones with abnormal EP distribution above are hazard sources inducing coal mass’s instability and failure. The study results provide the foundational research work of fine forecasting on coal and gas outburst disaster hazard.

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Title: Study on electric potential response’s spatial distribution characteristics to damaging localization evolution of gas-bearing coal under load
Authors: Yue Niu
Enyuan Wang
Zhonghui Li
Baolin Li
Feng Gao
Xianfeng Liu
Zhizhen Zhang
Qi Deng
Zhaoxi Long
Mingfu Wang
Jiali Wang
Liaoyuan Gao
Xin Zhang
Publication date: 01-01-2024
Publisher: Springer Berlin Heidelberg
Published in: Bulletin of Engineering Geology and the Environment / Issue 1/2024
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-023-03520-w

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