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<p>With the increase of coal seam mining depth, coal seam gas, pressure, etc. are becoming larger and larger. Scientific selection of protective layers is an effective measure to prevent coal mine outburst accidents and avoid gas exceeding the limit. Due to limited technical data available for selecting protective layers for mining before the coal seam was exposed, the previous methods for selecting protective layers were somewhat restricted. The article fully utilizes the gas geological data during the exploration period before the construction of the mine, and uses regression analysis method to compare and study the relationship between the gas content, coal seam thickness, and burial depth of the coal seams 15 and 9 in the mining area, and calculated the outburst coal amount between the coal seams 15 and 9 using the solid-gas-stress coupling equation. Research has shown that when the coal seam thickness is less than 2.5&#xa0;m and the burial depth is less than 585.2&#xa0;m, the gas content in coal seam 15 is lower than that in coal seam 9. The coal seam 15 has no risk of outburst, while the coal seam 9 has a risk of coal and gas outburst. The minable coal seams overlying the coal seam 15 are all located within its protective range and are not affected by mining-induced damage from the coal seam 15. Therefore, the coal seam 15 can be prioritized as a protective layer for the overlying coal seam 9 and other minable seams, achieving safe and sustainable production of the mine.</p>

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Study on mining with nearby coal seams as protective layers overlying limestone aquifers

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月26日

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  • Xianzhi Shi,
  • Guosheng Xu

摘要

With the increase of coal seam mining depth, coal seam gas, pressure, etc. are becoming larger and larger. Scientific selection of protective layers is an effective measure to prevent coal mine outburst accidents and avoid gas exceeding the limit. Due to limited technical data available for selecting protective layers for mining before the coal seam was exposed, the previous methods for selecting protective layers were somewhat restricted. The article fully utilizes the gas geological data during the exploration period before the construction of the mine, and uses regression analysis method to compare and study the relationship between the gas content, coal seam thickness, and burial depth of the coal seams 15 and 9 in the mining area, and calculated the outburst coal amount between the coal seams 15 and 9 using the solid-gas-stress coupling equation. Research has shown that when the coal seam thickness is less than 2.5 m and the burial depth is less than 585.2 m, the gas content in coal seam 15 is lower than that in coal seam 9. The coal seam 15 has no risk of outburst, while the coal seam 9 has a risk of coal and gas outburst. The minable coal seams overlying the coal seam 15 are all located within its protective range and are not affected by mining-induced damage from the coal seam 15. Therefore, the coal seam 15 can be prioritized as a protective layer for the overlying coal seam 9 and other minable seams, achieving safe and sustainable production of the mine.