摘要
赵固二矿西风井采用冻结法施工,穿过704.6 m深厚黏土层,冻结管断裂风险较大。井筒掘砌过程中,对冻结壁径向位移进行了实测,并兼顾其他影响因素。结果显示,70个位移监测层位中,共有57%的监测层位位移超过50 mm警戒值。
The west ventilation shaft of Zhaogu No.2 Mine was constructed with a ground freezing method.The mine shaft was passed through deep thick clay with a thickness of 704.6 m.The freezing pipe had a high broken risk.During the mine shaft lining processing,a site measurement was conducted on the radial displacement of the freezing wall in the mine shaft and the other influence factors were considered.The results showed that in 70 displacement measuring layers,the displacements of the 57%measuring layers were over the warning value of 50 mm.
作者
王恒
赵玉明
李晓伟
WANG Heng;ZHAO Yuming;LI Xiaowei(Beijing China Coal Mine Engineering Company Limited,Beijing 100013,China;Henan Guolong Mine Construction Company Limited,Zhengzhou 450000,China)
出处
《建井技术》
2019年第6期20-23,共4页
Mine Construction Technology
关键词
深厚黏土层
冻结壁
径向位移
冻结管断裂
deep thick clay
freezing wall
radial displacement
freezing pipe broken
