煤矿采煤工作面瓦斯抽放封孔技术研究

Study on Sealing Technology of Gas Drainage in Coal Mining Face

对煤矿瓦斯抽放钻孔封孔技术进行实验、分析、研究,依据钻孔外部岩层条件及钻孔施工技术要求,改进了封孔内外囊袋、封孔段位置及长度施工方法及各项技术指标,保证了工程质量,提高施工效率及瓦斯抽放效果。通过对注浆压力试验总结,确定了囊袋及封孔注浆压力值的确定方法及基本参数值,为高质量、高效率封孔注浆提供了适用参数及理论指导。

Based on the experiment, analysis and research of sealing technology for gas drainage boreholes in coal mines, according to the conditions of external rock strata and the requirements of drilling construction technology, the construction methods and technical indexes of inner and outer pockets, positions and lengths of sealing sections are improved to ensure the quality of the project,improve the construction efficiency and gas drainage effect. Through the summary of grouting pressure test, the determination method and basic parameters of grouting pressure value for bag and sealing are determined, which provides applicable parameters and theoretical guidance for high-quality and highefficiency sealing grouting.