DOI: 10.11799/ce201707018
Research and application of hole sealing technology withpressurized grouting in soft coal seam bedding drilling
BA Quan-bin
ZHAO Xu-sheng
LIU Yan-bao
Abstract：Aiming at the gas drainage problems with bedding drilling in soft coal seam,such as shallow sealing depth,tight sealing hole and so on,leading to poor pumping effect.Through analyzing the drilling stability and stress field of surrounding soft coal seam,the reasonable sealing depth of grouting hole sealing in soft coal seam was determined.By increasing borehole pressure to the hole wall,sealing filling fissure effectively,the paper proposed the grouting technology in soft coal seam.In the application in Baoan Coal Mine,during the 60 days inspection period,the average gas concentration of test hole increased more than 30%,the effect of drainage and hole sealing in soft coal seam was greatly improved.
Keywords：soft coal seamgas drainage boreholehole sealing depthpressurized groutinghole sealing technology
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( 61-63 )