基于钻屑理论的抽采钻孔合理封孔深度研究

Research on Reasonable Sealing Hole Depth of Extraction Borehole Based on Drilling Cuttings Theory

摘要: 为了准确确定瓦斯抽采钻孔的合理封孔深度，从巷道“三带”的角度分析了合理封孔深度的范围，并从钻屑量指标理论的角度探讨了钻屑量的影响因素。根据钻屑量与地应力的关系，基于黄岩汇矿的现场实际，通过计算钻屑量的变化规律，并结合FLAC^3D数值模拟软件，确定出试验区所在埋深的煤层合理封孔深度为8.5～13 m；经现场试验验证了合理封孔深度的准确性。
- 钻屑量 /
- 地应力 /
- 封孔深度 /
- 影响因素 /
- 抽采效果
Abstract: In order to accurately determine the reasonable sealing hole depth of extraction borehole, the article analyzed the reasonable range of sealing hole from the perspective of the roadway "three zones", and discussed the influence factors of drilling cuttings volume in terms of the drilling cuttings index theory. According to the relationship of drilling cuttings and ground stress, based on the site practices in Huangyanhui Mine, with the calculation on the variation law of drilling cuttings, and combined with numerical simulation software of FLAC^3D, the article determined the reasonable sealing hole depth was 8.5 to 13 m in the buried depth of experimental zone coal seam, which proved the accuracy by field test.
- drilling cutting quantity /
- ground stress /
- sealing depth /
- influence factor /
- extraction effect

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