Rapid Outburst Elimination Technology for Closed Distance Coal and Rock Roadways Going Forward One by One
SU Weiwei
WANG Chunguang
Abstract：In order to solve problem of rapid outburst elimination for concentrated return air roadway at heading face of Duanshi Mine.Based on the exploitation conditions of coal and rock roadways going forward one by one with closed distance,we use grade separation drainagc tcchnology with bedding holes and through beds holes to overall control outburst prevention area.To prevent blasting driving disturbance to damage holes in haulage roadway during gas extraction period,we use the outburst prevention and pretection technology of putting screen pipe down along the full length of bedding hole and using three-step and twice holesealing measure of "breaking hole,drilling hole,sectional hole sealing" in through beds hole to achieve efficient and long-time extraction of outburst prevention hole.After regional pre-drainage of 35 days to 40 days,the residual gas content of coal located in foreside and two sides of 15 m about concentrated return air roadway is all less than 8 m3/t,which satisfies the needs of outburst prevention effect,realizes rapid outburst elimination at heading face and ensures extraction and driving balance.
Keywords：close distance coal and rock roadwaygoing forward one by onegrade separation drainage technologydisturbing of blasting drivingresidual gas content
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 71-74,78 )