Drainage and Sealing Method in Downward Cross- layer Gas Pressure Determination Borehole
Abstract：Accurate determination of coal seam gas pressure is the effective protection of the prediction and prevention of mine gas, drilling water gushing and hydrocele problem are often encountered in measuring downward cross - layer borehole pressure process in rich water surrounding rock, which not only increase the difficulty of grouting sealing, but also influence the authentieity and reliability of the original gas pressure because of the impact of water pressure. To solve above problems, this paper attempts to explore the drain- age and sealing method under the conditions of water gushing and hydroeele in downward cross - layer gas pressure determination bore- hole. The field practice in Gedian mine of Shenhuo coal and electricity group proved that this method can effectively avoid the adverse effects of residual water and continued gushing caused by downward cross - layer gas pressure determination borehole and can more ac- curately measure the original gas pressure of the coal seams.
Keywords：downward drilling holesdrilling drainagepressure testsealing boreholegas pressure determination
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 66-68 )