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Failure Mechanism and Control Technology for Coal Roadway in Water-Rich Area

Author

Listed:
  • Hao Fan

    (State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China)

  • Xingang Niu

    (State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China
    State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China
    Gas Research Branch, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China)

  • Shaobo Li

    (State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China)

Abstract

Accurate analysis of failure mechanisms and scientific support for design of coal roadways in water-rich areas plays an important role in the long-term stability control of roadways. In this study, taking the water-rich 1044 return laneway in the Taoyuan Coal Mine of China as an example, laboratory experiments and field tests were performed to study the potential failure mechanisms of the roadway. It was found that the microcracks inside the coal body increase and strength of the coal decreases with the long-term influence of groundwater. The weak surrounding rock and high vertical in-situ stress were the main internal causes of roadway instabilities. Based on the potential failure mechanisms, a new optimal support design including bolt, cable, metal mesh, shotcrete, and grouting was proposed and detailed support parameters were introduced. A field experiment was performed with the new support, and surface deformations of the experimental roadway were monitored. Results show that the new support can reduce the deformation of the 1044 return laneway by nearly 90% compared with those of the original design. Support technology presented in this contribution provides a significant reference for the control of roadways in water-rich areas.

Suggested Citation

  • Hao Fan & Xingang Niu & Shaobo Li, 2022. "Failure Mechanism and Control Technology for Coal Roadway in Water-Rich Area," Sustainability, MDPI, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:gam:jsusta:v:15:y:2022:i:1:p:410-:d:1016034
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    References listed on IDEAS

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    1. Qiang Fu & Ke Yang & Xiang He & Zhen Wei & Qinggan Yang, 2022. "Characteristics of Strata Behavior and Differentiated Control of Fully Mechanized Mining Working Face with Abnormal Roof," Sustainability, MDPI, vol. 14(20), pages 1-15, October.
    2. Kai Wang & Lianguo Wang & Bo Ren, 2021. "Failure Mechanism Analysis and Support Technology for Roadway Tunnel in Fault Fracture Zone: A Case Study," Energies, MDPI, vol. 14(13), pages 1-19, June.
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