摘要
甘肃省庆阳市正宁县南部的核桃峪煤矿副立井冻结深度955m,为目前井筒冻结深度世界之最,同时该井筒还是一个事故井,冻结方案设计难度很大.对该井冻结方案的特点、难点与要解决的问题与博尔比钾盐矿进行了对比和探讨,针对该工程的难点提出了以大管径(Ф168mm)冻结管为代表的三大一小设计对策,以及采用同心双供液管和温控孔控制冻结壁发展等新技术解决了设计中的难题.取得了良好的效果,为以后类似工程提供了经验.
The freezing depth（955 m） of Hetaoyu coal mine auxiliary shaft is the deepest one in the world,25 m more than that of Balby Potassium Salt Shaft No1,UK,（930m in depth）.The shaft has met obstacles in the construction process,and has been forced to use freezing construction.Therefore,the design is very difficult.This paper focuses on the characteristics of the shaft freezing scheme,difficulties and problems to be solved,and makes a comparison with Balby Potassium Salt Shaft No.1.Aiming at the engineering difficulties,large diameter（Φ 168 mm） freezing tube is put forward,together with concentric double fluid supply tube and temperature control tube to control freezing wall development to solve the problems in design.Good effects are obtained.It is useful for the similar engineering in the future.
出处
《冰川冻土》
CSCD
北大核心
2012年第6期1358-1363,共6页
Journal of Glaciology and Geocryology
基金
国家"十二五"科技支撑计划项目(2012BAB13B02)资助
关键词
冻结深度
设计对策
井壁保护
对比
freezing depth
countermeasures
sidewall protection
comparison
