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Analysis of Spatial–Temporal Evolution of Mining-Induced Fracture Field: A Case Study Using Image Processing in the Shaqu Coal Mine, China

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Abstract

Mining-induced fracture plays a key role in gas drainage for gas burst-prone underground coal mines, especially for closely multilayered coal seams. The layout and location of the designed gas drainage boreholes have a huge influence on the performance of coal and gas extraction. The Shaqu coal mine exploits the #2 and #4 coal seams, which are gas burst-prone coal seams with low concentration of drained gas. The method of borehole camera observation was used in this study to investigate the evolution of fractures field in order to obtain an optimal borehole design. In addition, a method of pixel extraction and gray value calculation for borehole images was developed to obtain 3D gray value distributions for recorded borehole images. Based on the 3D gray value distribution for a borehole image, the evolution of borehole fractures was identified. Based on the analysis, an area of high-density mining-induced fractures within relatively stable overlying strata was found about 25–30 m above the working face of the protected coal seam. Therefore, it is considered that concentration, amount and stability of gas drainage should be improved if boreholes reach the fracture area to enhance gas drainage efficiency and improve mine safety in extraction of coal and gas.

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Acknowledgments

The authors acknowledge financial support provided by the State Key Research Development Program of China (2017YFC0804206), National Natural Science Foundation (51604154 and 51704046), National Science and Technology Major Project of China (2016ZX05067-005) and the Fundamental Research Funds for the Central Universities (3142019005 and 2018CDQYZH0001).

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Authors and Affiliations

  1. School of Safety Engineering, North China Institute of Science and Technology, Beijing, 101601, China

    Zhiheng Cheng, Biao Liu & Jicheng Feng

  2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, School of Resources and Safety Engineering, Chongqing University, Chongqing, 400044, China

    Quanle Zou

  3. Itasca Consulting Canada, Inc., Sudbury, ON, P3E 6C1, Canada

    Xin Wang

  4. CCTEG (China Coal Technology and Engineering Group Corp) Shenyang Research Institute, Fushun, Liaoning, China

    Zhiyan Zhao & Fulong Sun

Authors
  1. Zhiheng Cheng
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  2. Biao Liu
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  3. Quanle Zou
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  4. Xin Wang
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  5. Jicheng Feng
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  6. Zhiyan Zhao
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  7. Fulong Sun
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Correspondence to Quanle Zou or Xin Wang.

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Cheng, Z., Liu, B., Zou, Q. et al. Analysis of Spatial–Temporal Evolution of Mining-Induced Fracture Field: A Case Study Using Image Processing in the Shaqu Coal Mine, China. Nat Resour Res 29, 1601–1615 (2020). https://doi.org/10.1007/s11053-019-09540-2

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  • DOI: https://doi.org/10.1007/s11053-019-09540-2

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