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Numerical Multifield Coupling Model of Stress Evolution and Gas Migration: Application of Disaster Prediction and Mining Sustainability Development

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  • Xiangguo Kong

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mine and Hazard Prevention, Ministry of Education of China, Xi’an 710054, China)

  • Tianshuo Zhao

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mine and Hazard Prevention, Ministry of Education of China, Xi’an 710054, China)

  • Yuchu Cai

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Di He

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

At present, coal mining is gradually shifting towards deep areas, and coal mines under deep mining conditions are more prone to coal and gas outburst accidents. In this research, we aim to explain the causes and mechanisms of dynamic disasters, which are caused by the combined action of static load, gas, and dynamic load on tectonic regions in complex stress field environments. Through numerical simulation using COMSOL Multiphysics software, based on the geological conditions of a mine in Jilin Province, it was found that faults lead to abnormal stress in tectonic regions. The combined action of dynamic and static loads results in excessive stress, causing the fragmentation and displacement of the coal body, leading to coal mine disasters, thus disrupting sustainability. Additionally, the coal matrix gas entering fractures raises the gas pressure and leads to the accumulation of methane near earthquake sources. Dynamic loads accelerate gas desorption in coal and increase porosity and permeability, facilitating rapid gas migration. This influx of gas into the roadways exceeds safety limits. Then, based on these findings and on-site conditions, a set of sustainable measures for coal mines has been proposed. This research offers theoretical guidance for enhancing safety, stability, and sustainability in coal mining processes.

Suggested Citation

  • Xiangguo Kong & Tianshuo Zhao & Yuchu Cai & Di He, 2024. "Numerical Multifield Coupling Model of Stress Evolution and Gas Migration: Application of Disaster Prediction and Mining Sustainability Development," Sustainability, MDPI, vol. 16(9), pages 1-21, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:9:p:3667-:d:1384186
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    References listed on IDEAS

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    1. Zhengshuai Liu & Longyong Shu & Zhonggang Huo & Yongpeng Fan, 2023. "Numerical Study on the Mechanism of Coal and Gas Outburst in the Coal Seam Thickening Area during Mining," Energies, MDPI, vol. 16(7), pages 1-17, April.
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