Investigation and Analysis on Regional Outburst Prevention Effect Aimed at Upper Protective Seam Extraction in Wangjiazhai Coal Mine
YANG Chundong
Abstract：The regional outburst prevention measure by extracting the upper protective seam was taken in Wangjiazhai Coal Mine, the parameters such as the residual gas pressure of the protected seam, the deformation of coal body and so on were actually measured in order to effectively investigate the outburst prevention effect, and discussion and analysis were made on this measure through theoretical analysis and site tests. The results showed that after the extraction of the protective seam, the residual gas pressure of the protected seam dropped to the range for safe mining specified in“Coal Mine Safety Regulations”;the absolute deformation of the coal body of the protected seam was 3~55 mm and the relative deformation was 0. 49×10-3 ~13. 18×10-3;the pressure relief effect of the upper protective seam was obvious, this thus ensured the safe mining conditions of the protected seam.
Keywords：coal and gas outburstregional outburst prevention measureupper protective seamresidual gas pressuredeformation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 62-64 )