近年来,冻结法凿井技术在我国富水岩层矿井建设中的应用越来越广泛.为防止冻结壁融化后冻结孔成为竖向导水通道,威胁矿井的安全,冻结孔必须开展固管充填处理.针对某铁矿回风井冻结法凿井面临的地层条件及钻孔泥浆特点,通过室内及现场试验研究,获得了具有良好稳定性、较长缓凝时间且能与钻孔化学泥浆相容的缓凝水泥浆液配方,并研究制订了合理的冻结孔固管充填施工技术与工艺.冻结孔固管充填技术在该矿井的成功应用,证实了所研发的缓凝水泥浆液配方及相关施工技术与工艺的可行性与可靠性.%In recent years, freezing sinking technology is widely used in water-bearing rock strata in our country. To prevent the freezing hole becoming vertical water channels after the ice wall thawing, consequently threatening the safety of the mine,the hollow space around freezing pipes in freezing holes must be filled. Aiming at the strara condition and drilling mud features in freeze sinking in the ventilation shaft of an iron mine, the retarding cement grout formula, which is stable and has long slow setting time and considerable compatibility with drilling mud,was obtained through a large number of laboratory and field tests; then,the reasonable technology and process were produced for the freezing holes filling. The successful application of this technology in the iron mine, proved its feasibility and reliability of the formula and the related process.
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