Freezing Construction Technology of Seam under Aquifer in Alluvium of Mine Shaft
SHEN Hua-jun
Abstract：A thickness of an alluvium in a new mine auxiliary shaft of Xinhe Mine was 216.5m .There was a gravel aquifer with a thickness of 7.52m at the bottom of the alluvium ,the underground water flow velocity was 18.048m/d and under the gravel aquifer ,there was a seam with a thickness of 10m . The water content of the seam was uneven ,the freezability was poor and only to rely on the freezing water sealing passing through the seam would have a high risk. Finally after the study conducted ,it was determined that while a freezing operation was kept ,the shaft was forced to pass through the seam with the metal frames and grouting as a pilot support as well as excavation and lining conducted in a short section. After the plan was completed ,a full success was obtained.
Keywords：mine shaftaquiferunderground water flow velocityseam freezingmetal frame
Publication Date：2014-09-18
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 26-29,59 )