DOI: 10.11799/ce201701014
Improvement and the application of sealing technology for crossing hole in Songzao Coal Mine
YANG Ri-Li
ZHAO Xiao-Xia
Abstract：Through the analysis on the drilling hole gas drainage effect (2225 working face crossing seam drainage, K2 air way drilling field layout, crossing seam drainage gas in Kb3 coal seam), it is found that hole sealing technology directly affects gas drainage. Based on the original hole sealing technology and combining with filed conditions, an improved drilling scheme for transportation roadway was proposed, considering the drilling layout, sealing material and depth, grouting time, pre-plugging depth. Test results of the scheme showed that, with a little rise in the cost and drilling pressure relief time, the pressure-relief gas drainage amount was greatly increased, the drilling field pre-pumping concentration was enhanced to 4. 4 times, the drainage efficiency was improved.
Keywords：gas drainagecrossing holehole-sealing technologydrainage effect
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：3( 46-48 )