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Experimental Study on the Movement and Evolution of Overburden Strata Under Reamer-Pillar Coal Mining Based on Distributed Optical Fiber Monitoring

Author

Listed:
  • Chunde Piao

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China)

  • Shaogang Lei

    (School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China)

  • Jiakun Yang

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
    China Construction First Building (Group) Corporation Limited, Beijing 100071, China)

  • Lihong Sang

    (School of Land Science and Technology, China University of Geosciences, Beijing 100083, China)

Abstract

Focusing on the deterioration of the surface ecological environment caused by large-scale exploitation of the Jurassic coal field in northern Shaanxi, the three-dimensional similar material test model is made to simulate the extraction of shallow coal seam. Using Brillouin optical time-domain analysis (BOTDA) optical fiber distributed sensing technology, this paper studied the strain distribution rule and movement characteristics of strata under reamer-pillar mining, analyzed the stability of the remaining coal pillars in the mining area, and obtained the strain contour graph of strata through calculations. The research result shows that the deformation of coal pillars in a safety-critical state under reamer-pillar mining experiences three stages. The stratum deformation is distributed in the shape of a pyramid with the mining area as the center. On the basis of the strain distribution of strata, the settlement curve and subsidence curve of strata deformation are determined to obtain the rupture angle and angle of draw. After being compared with the measured data, the angle values are almost the same.

Suggested Citation

  • Chunde Piao & Shaogang Lei & Jiakun Yang & Lihong Sang, 2018. "Experimental Study on the Movement and Evolution of Overburden Strata Under Reamer-Pillar Coal Mining Based on Distributed Optical Fiber Monitoring," Energies, MDPI, vol. 12(1), pages 1-12, December.
    • Handle: RePEc:gam:jeners:v:12:y:2018:i:1:p:77-:d:193577
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    References listed on IDEAS

    as
    1. Yiwen Lan & Rui Gao & Bin Yu & Xiangbin Meng, 2018. "In Situ Studies on the Characteristics of Strata Structures and Behaviors in Mining of a Thick Coal Seam with Hard Roofs," Energies, MDPI, vol. 11(9), pages 1-10, September.
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