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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 12 - 2024 | doi: 10.3389/feart.2024.1501631
This article is part of the Research Topic Advanced Materials and Technologies for Sustainable Development of Underground Resources View all 12 articles

Evolution of the Overlying Strata Structure and Characteristics of Ground Pressure Behavior under the Influence of Tectonic Stress

Provisionally accepted
Zhijie Zhu Zhijie Zhu 1,2*peng wang peng wang 1kun chen kun chen 3fei lv fei lv 3yin hong yin hong 1
  • 1 Liaoning Technical University, Fuxin, China
  • 2 State Key Laboratory of Coal Mining and Clean Utilization, Beijing, China
  • 3 Shaanxi Huabin Yadian Coal Industry Co., binzhou, China

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

    The evolution of overlying strata structures significantly influences the manifestation of ground pressure behavior in working faces. The mechanism through which tectonic stress influences the evolution of overlying rock structures remains unclear. To address this, we established a nonlinear dynamic mathematical-mechanical model to analyse and propose a theory for the structural evolution of overlying rock structures under tectonic stress. Based on the 8105 working face in Tongxin Mine, China, we used theoretical calculations and numerical simulations to analyse the influence of tectonic stress on the formation and evolution of the overlying rock "plate-shell" structure. Under similar coal and rock seam distribution conditions, higher tectonic stress led to larger first failure interval of the key stratum. Consequently, the scale of the "plate-shell" structure controlled by the key stratum increased, resulting in more pronounced ground pressure behavior. The EH-4 geomagnetic method and numerical simulations indicated that the damage height of the overlying strata at the working face was 170 m. In response to the intense manifestation of mineral pressure resulting from large-scale overlying strata structure above the working face, the implementation of precracking blasting can significantly reduce the failure interval of the key stratum and alleviate surrounding rock stress.

    Keywords: Tectonic stress, Overlying rock structure, Overlying Rock Damage Height, Intense Ground Pressure Behavior, Key stratum

    Received: 25 Sep 2024; Accepted: 30 Oct 2024.

    Copyright: © 2024 Zhu, wang, chen, lv and hong. 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: Zhijie Zhu, Liaoning Technical University, Fuxin, China

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