新型封孔剂在含水煤层瓦斯压力测定中的应用

针对传统封孔材料在含水煤层钻孔经过裂隙带情况下应用时凝结时间长且容易收缩、干裂而导致密闭性差等问题,提出了一种在传统水泥浆基础上加以改进的新型封孔剂,并将其应用于某矿井高压注浆封孔工艺。应用结果表明,该新型封孔剂的凝固时间约为12h;采用该新型封孔剂封孔时煤层瓦斯压力测定结果较传统封孔材料可靠,且堵水效果更好。

Application of a new hole-sealing reagent in gas pressure determination of water-bearing coal seam

Traditional hole-sealing materials have some disadvantages such as long concretion time,poor airtightness caused by shrinkage and xerochasy and so on under the condition that drilling hole of water-bearing coal seam passes fissure zone.A new type of hole-sealing reagent was proposed on the basis of traditional grout and applied in high pressure grouting hole-sealing process in a coal mine.Application result shows that concretion time of the new hole-sealing reagent is 12 h,and the new hole-sealing reagent has more reliable measurement result of gas pressure of coal seam than traditional hole-sealing material as well as better effect of water stem.