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<p>Data on the distribution of water-conducting fissure zones (WCFZs) were collected in 40 Chinese coal mines and multivariate linear fitting of the data was carried out using SPSS software to establish a predictive model for the height of the WCFZ during integrated mining of a moderately thick coal seam. Focusing on working face 2108 in the Heilongguan coal mine in Shanxi, the development height and distribution of the WCFZ in the rock overlying the mine’s void space was quantitatively interpreted by measuring the amount of leakage of water injected through the drilling boreholes and by using FLAC3D numerical simulation to verify the validity of the predictive model for the height of the WCFZ in a moderately thick coal seam. A multivariate linear regression model was established for calculating the height of the WCFZ. The maximum vertical heights of the plastic deformation zones obtained from field tests of water injection leakage in actual engineering boreholes and numerical simulation methods were basically consistent with the results of the model proposed in this paper. The height and spatial development morphology of the WCFZ obtained using the three methods are in good agreement.</p>

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A Method for Assessing the Height and Three-Dimensional Spatial Development Characteristics of Water-Conducting Fissure Zones in Integrated Mining of a Moderately Thick Coal Seam

  • 期刊论文

  • 发表日期：

    2025年4月18日

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  • Lijuan Zhao,
  • Junqian Zhou,
  • Mingzhong Gao,
  • Xingui Wang,
  • Hongfei Duan,
  • Wenling Lv,
  • Zhenjian Yu,
  • Jing Xie,
  • Pengfei Cui,
  • Jianjun Hu,
  • Haichun Hao,
  • Mingbo Chi

摘要

Data on the distribution of water-conducting fissure zones (WCFZs) were collected in 40 Chinese coal mines and multivariate linear fitting of the data was carried out using SPSS software to establish a predictive model for the height of the WCFZ during integrated mining of a moderately thick coal seam. Focusing on working face 2108 in the Heilongguan coal mine in Shanxi, the development height and distribution of the WCFZ in the rock overlying the mine’s void space was quantitatively interpreted by measuring the amount of leakage of water injected through the drilling boreholes and by using FLAC3D numerical simulation to verify the validity of the predictive model for the height of the WCFZ in a moderately thick coal seam. A multivariate linear regression model was established for calculating the height of the WCFZ. The maximum vertical heights of the plastic deformation zones obtained from field tests of water injection leakage in actual engineering boreholes and numerical simulation methods were basically consistent with the results of the model proposed in this paper. The height and spatial development morphology of the WCFZ obtained using the three methods are in good agreement.