西部软岩地层冻结井筒固管水文孔施工技术  

Construction technology of hydrologic hole in frozen shaft pipe of soft rock stratum in west China

作　　者：高伟 GAO Wei(Beijing China Coal Mine Engineering Company Limited,Beijing 100013,China;National Engineering Research Center of Deep Shaft Construction,Beijing 100013,China)

机构地区：[1]北京中煤矿山工程有限公司,北京100013 [2]矿山深井建设技术国家工程研究中心,北京100013

出　　处：《建井技术》2024年第1期1-4,共4页Mine Construction Technology

摘　　要：西部软岩地层具有隔水层较薄、含水层较厚的地质特征,在冻结法施工井筒时会造成水文孔报导困难。水文孔是判断冻结壁发展规律和确定井筒开挖时间的主要依据,为了确保水文孔能够准确报导,采用水泥浆固管技术来封堵水文孔套管与围岩之间的环形空间,以确保套管与地层有效黏合,并避免上下层位串水。通过工程实践,验证了该项技术的可行性,为井筒修复冻结工程及类似工程提供了有价值的参考。The geological characteristics of thin aquifuge and thick aquifer in the western soft rock stratum make it difficult to report the hydrological hole when the shaft is constructed by freezing method.However,hydrologic hole is the main basis to judge the development law of frozen wall and determine the time of shaft excavation.In order to ensure the accurate reporting of hydrologic hole,the annular space mud replacement technology was used to seal the annular space between the casing and the surrounding rock of the hydrological hole,so as to ensure the effective between the casing and the formation and avoid the water flow between the upper and lower layers.The feasibility of the technology was verified by engineering practice,which provides a valuable reference for shaft repair freezing engineering and similar projects.

关 键 词：软岩 冻结 井筒 水文孔 

分 类 号：TD265.3[矿业工程—矿井建设]