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针对传统封孔测压技术密封效果不佳及喷浆现象,提出“胶囊-聚氨酯”组合带压注浆封孔测压技术。通过现场对比应用表明,“胶囊-聚氨酯”组合带压注浆封孔测压技术比传统封孔技术具有密封效果好,前期压降稳定快,测压时间短,测试结果更接近原始煤层瓦斯压力等优点。
Aiming at the poor sealing performance and sealing phenomenon of the traditional sealing technique, a “capsule-polyurethane” combination grouting seal sealing technology was proposed. The field application shows that the combination of “capsule-polyurethane” grouting seal grouting technology has better sealing effect than the traditional sealing technology, the pressure drop is stable and the pressure measurement time is short, and the test result is closer to the original coal seam Gas pressure and other advantages.