Application of the Grouting Cement Method with Two-Step Filling Water to Collapsed Formation of the Scientific Drilling Borehole in oft-com:office:smarttags" />Tibet
详细信息
- 责任者：Hu Yule (China University of Geosciences ; Wuhan 430074 ; China) ; Zhang Xiaoxi
- 刊名：Geology and Prospecting
- 出版年：2011
- 卷期：47(3)
- 关键词：钻探工程 ; drilling engineering ; 灌浆 ; grouting
- 页码：p.469-472
- 图表：2 illus., 19 refs.
- 分类号：2000
- 出版序号：1505
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The scientific drilling hole at Luobusha in Tibet lies in very complicated strata, where the conventional cement-grouting method for protecting the hole wall cannot work well. There was a kind of phenomena that cement grouted deviated from the target hole section and back to the top, because of the abnormal pressure and collapsed formation. This paper presents the principle and technique of the grouting cement method with two-step replacing water. In combination with the actual project, it has explained the cause of abnormal grouting pressure and the process of step by step for water control, providing a new technology for grouting strata with abnormal pressure.