Safety, Quality and High Efficient Construction of Ultra Deep Mine Shaft in Cixi Mine
JIANG Jun
WU Jian
Abstract：A No? 1 mine auxiliary shaft of Cixi Mine had a net diameter of 8m and a shaft depth of 1 341? 6m? A ground freezing construction method was applied to an alluvium and weathered base rock section of the mine auxiliary shaft and the freezing depth was 245m?A surface pre—grouting method was applied to construct the base rock section of the mine auxiliary shaft and the grouting depth was 1 355m? The alluvium section of the mine shaft was excavated with a small type excavator ,the outer concrete wall was built with a completed metal pattern plate and the inner concrete wall was built with segment type metal pattern plate? The base rock section of the mine shaft was excavated with a drilling and blasting method? A umbrella drill was applied to the rock drilling ,the rock blasting was conducted with medium depth boreholes and the depth of the borehole was 4? 5m? A completed metal pattern plate applied to the mine shaft lining realized a safety ,quality and high efficient construction and could provide the experiences to the construction of the ultra deep mine shaft.
Keywords：ultra deep mine shaftground freezing methodsurface pre-groutinghigh efficient construc_tionmedium deep borehole blasting
Publication Date：2014-07-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 4-7,45 )