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为了提高瓦斯抽采浓度,以小屯煤矿底抽巷现有瓦斯抽采钻孔封孔工艺为背景,针对封孔过程中出现的封孔质量差导致抽采浓度过低、封孔效率低及材料浪费现象,从优化封孔工艺、水泥浆与马丽散最佳性能配比、注浆长度、需水及水泥用量、现场搅拌盒设计五方面考虑,设计便捷的现场水泥搅拌盒,优化封孔工艺运用于现场瓦斯浓度稳定在25%-58%。结果表明,优化封孔工艺提高了瓦斯抽采浓度、封孔效率,并节约封孔成本。
In order to improve the concentration of gas drainage, taking the existing gas drainage hole sealing technology in the bottom pumping tunnel of Xiaotun Coal Mine as the background, in view of the poor sealing quality in the sealing process, the pumping concentration is too low and the sealing efficiency is low Material waste phenomenon, from the optimization of sealing technology, the best performance of cement slurry and Marley powder ratio, grouting length, water and cement consumption, on-site mixing box design of five considerations, the design of convenient on-site cement mixing box, Hole technology used in the site gas concentration stabilized at 25% -58%. The results show that the optimized sealing technology can improve the gas drainage density, plugging efficiency and save sealing cost.