Study on Outburst Prevention Technology in Opening Seam with Serious Dangerous Outburst of Cross-cut
Abstract：In order to solve the outburst danger increased and the long seam opening period during the seam opening occurred by the high ground stress,high structure stress and high gas pressure at the seam opening location of the geological structure zone,the lower seam permeability coefficient and the complicated geological conditions of the Songzao Mining Area,the application of the pilot exploration,the prediction and pre-warning,the high pressurized hydraulic slot cutting for the permeability improvement,the pilot gas pre-drainage from the floor of the gateway,the ring metal support frame,the bolt-steel mesh-anchor-shotcreting reinforced support and the asymptotic type comprehensive cross-cut seam opening technology were provided and applied to Yuyang Mine.The results showed that with the application of the comprehensive cross-cut seam opening technology,the gas average drainage density was improved by 59% than the average drainage density with no slot cutting boreholes.After the high pressurized hydraulic slot cutting,the average drainage pure quantity per borehole was improved by 2.92 times and the seam opening time was reduced by 17 days.
Keywords：complicated geological conditionsserious outburst seamcross-cut seam openingpilot explorationhigh pressurized hydraulic slot cutting
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)