In-Situ Measurement and Analysis of Freezing Pressure of Shaft Lining in Western Jurassic Stratum Deep Bedrock
Abstract：To master the load of outer shaft lining in western jurassic deep aqueous bedrock ,by using the vibrating wire sensors to measure and analyze bedrock's freezing pressure of Hongqinghe Coal Mine No.2 Air Shaft in Xinjie Mining Area ,freezing pressure variation of outer shaft lining was ob-tained. The results show that the development tendency of freezing pressure had stage features ,a freezing pressure was seriously increased within 12 d after concrete pouring ,reached at 1.286~1.371 M Pa and w hich is 70% ~88% of the final steady-state value ,then slow grow th and decline ,gradual steadiness eventually ;the freezing pressure had inhomogeneity at the same level ,w hich caused by in-situ test and many factors ;the measured maximum value of freezing pressure in jurassic stratum is 1.872 MPa ,which is far less than the upper limit value in eastern epipedon and the maximal empirical value of w estern bedrock.
Keywords：jurassic stratumdeep bedrockfreeze sinking methodfreezing pressure
Publication Date：2015-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 27-30,14 )