Research on High-strength Coupling Support Technology of High Stress Extremely Soft Rock Roadway
Starting from the control of concentrated stress in surrounding rocks transfer and reducing the area of rock crushing,analyzed the characteristics of deformation and failure in Shuijingtou Coal Mine -300 m east roadway of Hunan Niumasi Mining Company,obtained the roadway failure mechanism,pointed
out that the main reason of leading to severe deformation is initiative to pressure and low intensity support with the original support method.Through field testing and numerical simulation,advanced the support technology as “High resistance pressure allowing and high-strength”
by using highstrength bolting,strong anchor,grouting surrounding rock,according to the field monitoring data and coupling support principle,determined a reasonable coupling support time which related to all links of the support:U-shaped steel support is 32 h after surrounding rocks bolting,grouting
support is 10 d after U-shaped steel support.
Keywords: extremely soft rock; high resistance pressure allowing,high-strength support; high stress
Document Type: Research Article
Publication date: 15 March 2011
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