Pressure stimulated current in progressive failure process of combined coal-rock under uniaxial compression: Response and mechanism

Tiancheng Shan; Zhonghui Li; Xin Zhang; Haishan Jia; Xiaoran Wang; Enyuan Wang; Yue Niu; Dong Chen; Weichen Sun; Dongming Wang

International Journal of Mining Science and Technology (Feb 2024)

Pressure stimulated current in progressive failure process of combined coal-rock under uniaxial compression: Response and mechanism

Tiancheng Shan,
Zhonghui Li,
Xin Zhang,
Haishan Jia,
Xiaoran Wang,
Enyuan Wang,
Yue Niu,
Dong Chen,
Weichen Sun,
Dongming Wang

Affiliations

Tiancheng Shan: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Zhonghui Li: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China; Corresponding authors.
Xin Zhang: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Haishan Jia: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Xiaoran Wang: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology, Xuzhou 221116, China; Corresponding authors.
Enyuan Wang: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Yue Niu: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Dong Chen: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Weichen Sun: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
Dongming Wang: State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center for Coal Gas Control, China University of Mining and Technology, Xuzhou 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China

Journal volume & issue: Vol. 34, no. 2
pp. 227 – 243

Abstract

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Effective monitoring of the structural health of combined coal-rock under complex geological conditions by pressure stimulated currents (PSCs) has great potential for the understanding of dynamic disasters in underground engineering. To reveal the effect of this way, the uniaxial compression experiments with PSC monitoring were conducted on three types of coal-rock combination samples with different strength combinations. The mechanism explanation of PSCs are investigated by resistivity test, atomic force microscopy (AFM) and computed tomography (CT) methods, and a PSC flow model based on progressive failure process is proposed. The influence of strength combinations on PSCs in the progressive failure process are emphasized. The results show the PSC responses between rock part, coal part and the two components are different, which are affected by multi-scale fracture characteristics and electrical properties. As the rock strength decreases, the progressive failure process changes obviously with the influence range of interface constraint effect decreasing, resulting in the different responses of PSC strength and direction in different parts to fracture behaviors. The PSC flow model is initially validated by the relationship between the accumulated charges of different parts. The results are expected to provide a new reference and method for mining design and roadway quality assessment.

Published in International Journal of Mining Science and Technology

ISSN: 2095-2686 (Print); 2589-062X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/international-journal-of-mining-science-and-technology

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