摘要
以高家堡煤矿西区进风立井的冻结法施工为背景,对井筒冻结技术方案、冻结质量保障措施开展了详细探讨。实践表明,将供液管由常规的Φ75 mm×6 mm增大到Φ85 mm×7 mm,可以有效保证冻结管末端的盐水温度,将冻结管盐水流量增大至20 m^(3)/h,保障了地下水大流速、高地温条件下近千米深立井的冻结效果。进风立井冻结工程于2019-12-18开机冻结,井筒于2020-12-27顺利掘砌到底,创造了岩层冻结深度990 m的新纪录。相关研究可为类似地层条件下的立井冻结工程提供参考。
Based on the freezing method construction of the intake vertical shaft in the west of Gaojiapu Coal Mine,the freezing technical scheme and freezing quality assurance measures of the shaft were discussed in detail.The practice showed that increasing the liquid supply pipe from the conventionalΦ75 mm×6 mm toΦ85 mm×7 mm could effectively ensure the salt water temperature at the end of freezing pipes,and increase the salt water flow rate of the freezing pipes to 20 m^(3)/h,and ensure the freezing effect of the vertical shaft lining with a depth of nearly 7000 meters under the condition of large groundwater flow rate and high ground temperature.The intake shaft freezing project started on 2019-12-18,and the shaft lining was successfully constructed on 2020-12-27,which created a new record of rock strata freezing depth of 990 m.The relevant research could provide reference for shaft freezing engineering under similar stratum conditions.
作者
陈海瑞
张学如
万修波
李国远
王伟
CHEN Hairui;ZHANG Xueru;WAN Xiubo;LI Guoyuan;WANG Wei(Shaanxi Zhengtong Coal Industry Company Limited,Xianyang 713600,China)
出处
《建井技术》
2023年第4期30-35,共6页
Mine Construction Technology
关键词
立井井筒
富水岩层
冻结法
冻结深度
vertical shaft
water-rich rock strata
artificial ground freezing method
freezing depth
