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

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外文摘要：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 pro-cess are emphasized.The results show the PSC responses between rock part,coal part and the two com-ponents 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 relation-ship between the accumulated charges of different parts.The results are expected to provide a new ref-erence and method for mining design and roadway quality assessment.

外文关键词：

Combined coal-rockPressure stimulated currentProgressive failure processMechanismFlow model

作者：

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

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作者单位：

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

State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources,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

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基金：

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金青年基金

项目编号：

2022YFC300470552074280522279015220424952104230

出版年：

2024

DOI：

10.1016/j.ijmst.2023.12.008

矿业科学技术学报(英文版)

中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI

影响因子：1.222

ISSN：2095-2686

年,卷(期)：2024.34(2)

参考文献量35