返渣封孔新技术现场试验及机理探索

    Field Test and Mechanism Exploration of a New Hole Sealing Technology with Recycling Residue

    • 摘要: 为了进一步提高穿层钻孔封孔质量和瓦斯抽采效果,分析了现有穿层封孔技术的不足,阐述了返渣封孔新技术的工艺原理和参数设计,以及其封孔深度和抽采负压的合理选择,并在平煤八矿己15-14140底抽巷与中抽巷依次开展了3个设计方案的现场返渣封孔试验。同时运用颗粒流软件PFC2D优化验证钻孔返渣技术。结果表明,经过返渣封孔工艺参数的多次优化改进,得出了具有突出工作效率和抽采效果的封孔设计,为矿井高效治理瓦斯奠定了技术基础。

       

      Abstract: In order to further improve the hole sealing quality in through beds holes and the effect of gas drainage, we discussed the deficiency of existing hole sealing technologies in through beds holes, and described the technical principle and parameters design of the hole sealing technology with recycling residue, as well as the reasonable selection of the depth of borehole sealing and suction pression of drainage system. In addition, three schemes on test of the drillhole sealing technology with recycling residue were successively designed and implemented in Ⅵ15-14140 bed plate tunnel and middle plate tunnel of Pingmei No.8 mine. The results show that, by the optimization and improvement of technical parameters in the hole sealing with recycling residue, scheme Ⅲ has a better performance in work efficiency and effect of gas drainage and provides reference value and technical base for gas management.

       

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