Classification sealing principle and engineering application of gas pressure measurement borehole
HAO Jinwei
SHU Longyong
HAN Xintao
FAN Yongpeng
Abstract：Inadequate assessment of the sealing environment,and inappropriate sealing techniques and material parameters,lead to low gas pressure measurement value,high failure rates,increased costs and poor sealing quality in gas pressure measurement boreholes.By analyzing the distribution patterns of mining-induced influ-ence radius of roadway surrounding rock under different coal-rock conditions,scientific requirements for the layout of gas pressure measurement boreholes are proposed.Based on the characteristics of coal-rock fractures between the borehole opening location and the pressure measurement chamber,pressure measurement boreholes are divided into four major types:complete type,separation type,in-seam type,and cross-seam type.Corre-sponding borehole sealing methods are proposed.Combined with field applications,the results of gas pressure measurements under different sealing conditions were analyzed,providing reliable engineering guidance for ac-curately determining gas pressure in underground coal seams.
Keywords：gas pressureborehole sealinglayered rockcomplete type boreholeseparation type borehole
Publication Date：2026-02-28
Online Publishing Date：2026-03-12(First online date of this platform, not the publication date of the document)
Pages：8( 63-70 )