DOI: 10.11799/ce201802017
Application of integrated drilling-casing-sealing technology in efficiency improvement of safe gas drainage
XI Zai-zhong
Abstract：Aiming at the poor airtightness of gas drainage borehole sealing, large air leakage and spontaneous combustion of associated broken coal, a new integrated drilling-casing-sealing technology is proposed for of gas drainage borehole sealing, which injects flexible paste sealing materials to seal the borehole, and sprays the viscous inorganic sealing materials around the drilling holes to realize the dynamic sealing of new cracks around borehole, isolates the broken coal from the surrounding air to improve the concentration of gas drainage and reduce the risk of broken coal spontaneous combustion. The field experiment of Xiaohaizi Coal Mine showed that the leakage of coal around the gas drainage borehole was greatly reduced after adopting the proposed technology, the gas drainage concentration was 2.3 times higher than that of the conventional sealing hole drilling, the temperature decreased 12.8℃, broken coal spontaneous combustion risk significantly reduced, and effectively protect the safety of gas drainage and efficient operation.
Keywords：drilling septum sealing technologygas drainagespontaneous combustionflexible paste materialventilation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 63-65,69 )