Study on Outburst Elimination and Rapid Mine Roadway Construction Technology During Cross-cut Opened Structure Soft Coal
Abstract：Analyzed the coal outburst mechanism occurred by the structure soft coal zone opened at the cross-cut, according to the outburst high danger and high strength problems occurred by the seam opened at the cross-cut, the pre-cracking blasting with deep boreholes in the structure soft coal zone for the outburst elimination and the rapid mine roadway construction technology were provided and the site test research was carried out in Luling Coal Mine. The results showed that with 24 hours after the deep borehole blasting, the drained gas volume fraction and the pure flow kept in long time was 2- 3 times higher than the previous. The large cross section roadway rapid con- struction technology with U type steel shield support applied could make the gateway cross section increase by 41% and ensured the mine safety production. During the seam opened at cross-cut period, the gas content over the limit and the outburst accident was effectively eliminated, there was no coal wall spalling, roof leakage and roof failing accident occurred and the time to open the seam reduced by 5 - 8 days.
Keywords：seam opened at cross-cutstructure soft coalcoal and gas outburstpre-cracking blastingoutburst elimination
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 66-68,111 )