Mix Ratio Design and Application of High Strength and HighPerformance Concrete to Mine Freezing Shaft Liner
SUN Shi-yuan
YAO Zhi-shu
Abstract：There were two mine shafts,including a mine air intake shaft and a mine air returning shaft to be constructed for the level two deepening project of Guqiao Mine.A ground freezing shaft sinking method was applied to the two mine shafts.The freezing depth of the two shafts was 472 m and 464 m individually.Both the two shafts would pass through several thick swelling clay layers below the depth of 300 m.According to the durability,anti-cracking and impermeability requirements of the inner shaft liner at the deep and thick swelling clay layers of the two mine shafts,the preparation ideas of the high strength and high performance concretes were determined for the mine shaft liners.An overall calculation method was applied to design the mix ratio parameters of the high strength and high performance concrete.A rational selection was conducted on the raw materials and the tests were conducted.The mix ratios of C60、C65 and C70 high strength and high performance concretes were optimized and were applied to the constructions of the mine shaft liners with an excellent effect.
Keywords：mine freezing shaft linerhigh strength and high performance concretemix ratio designmineral admixture
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )