Combined Permeability Improvement Technology of High-pressure Hydraulic Slotting with Hydraulic Fracturing and Its Application
QIN Jiangtao
CHEN Yutao
Abstract：To counter the problems of high structural stress, low air permeability coefficient and poor gas drainage effect of the outburst coal seam in Baijiao Mine, the gas drainage test in B4 seam by 238 floor drainage roadway was carried out with the combined permeability improvement technology of high-pressure hydraulic slotting with hydraulic fracturing. The application results showed that this technology improved the permeability of the coal seam as compared to the hydraulic fracturing technology and the conventional gas drainage technology. The pure gas drainage volume increased 1. 33 times to that by hydraulic fracturing, the volume fraction of gas was 2. 76 times higher than that by the conventional drainage boreholes, the summary volume fraction of gas with the combined permeability improvement technology maintained over 30% without any attenuation, so this technology has good drainage effect.
Keywords：hydraulic fracturinghydraulic slottingcombined permeability improvement technologyoutburst seamlow permeabilitygas drainage
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 29-31,36 )