Research on New Borehole Sealing Material and Sealing Technique Applied to Mine Gas Drainage
Abstract：In order to solve the poor borehole sealing quality, low gas drainage negative pressure, poor gas drainage effect and other prob- lems of the gas drainage borehole in Shanmushu Mine, a new mine borehole sealing material PD and borehole sealing technique was ap- plied. The microencapsulation technology was applied to the material PD. Thus the grout of the material would be steadily swollen during the slow solidification process and would be permeated into the micro cracks around the borehole. Therefore the sealing of the cracks a- round the horehole could be formed. During the application process of the material, Pengbo borehole sealing material as the secondary ma- terial was applied as the grouting plug, and there would be a two sealing and one grouting sealing technique formed with a grouting be- tween two sealing ends. The applied results showed that in comparison with the conventional borehole sealing technique, the average gas volume fraction of the gas drainage borehole was improved from 22. 6% to 36. 8% , the average gas drainage negative pressure was im- proved from 2. 8 kPa to 9. 1 kPa and the average net gas flow value of a gas borehole was improved from 9. 42 L/min to 44. 53 L/min.
Keywords：new mine borehole sealing material PDPengbo borehole sealing agentborehole sealgas drainage effect
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：4( 60-63 )