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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 12 - 2024 | doi: 10.3389/feart.2024.1487505
This article is part of the Research Topic Monitoring, Early Warning and Mitigation of Natural and Engineered Slopes – Volume IV View all 20 articles

Study on mining response law and coal burst risk assessment of isolated working face

Provisionally accepted
Guojun Liu Guojun Liu 1Ruide Lei Ruide Lei 2*Ling Huang Ling Huang 2Guojun Liu Guojun Liu 3Jiankun Zhou Jiankun Zhou 3
  • 1 Hunan City University, Yiyang, China
  • 2 Sichuan University of Science and Engineering, Zigong, China
  • 3 Chongqing Institute of Geology and Mineral Resources, Chongqing, China

The final, formatted version of the article will be published soon.

    With the increasing demand for coal resources and the unreasonable arrangement of subsequent working faces, mining activities in isolated working faces are more likely to induce coal burst accidents. This study utilizes the minimum distance principle as the risk assessment indicator and introduces the quantitative theory to evaluate of coal burst risk in isolated working faces. Through a case study in the 1304 isolated working face of Yangcheng Coal Mine, the key factors affecting the risk of coal burst were identified, and a three-dimensional coal burst risk assessment model was constructed to evaluate the risk of the isolated working face. The results show that as the working face advances, the abutment pressure and elastic strain energy density in front of the working face increase to the peak value in a positive exponential relationship at first and then decrease to situ stress, which presents an upward convex trend. Under different , the concentration coefficient of the peak stress gradually increases. The influence range of the abutment pressure of the working face gradually increases. Compared with one-dimensional and two-dimensional evaluation functions, the three-dimensional function significantly improves the accuracy of risk assessment and successfully identifies strong coal and gas outburst risks. Additionally, the model not only enhances the precision of risk assessment but also quantifies the assessment parameters.

    Keywords: Coal burst, Risk evaluation, Isolated working face, Quantitative theory, Elastic strain energy density

    Received: 28 Aug 2024; Accepted: 14 Oct 2024.

    Copyright: © 2024 Liu, Lei, Huang, Liu and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Ruide Lei, Sichuan University of Science and Engineering, Zigong, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.