Study on Critical Value of Inspection Index of Gas Pre-drainage Effect in Three-soft Seam in West Henan Coal Field
GAO Junwei
Abstract：In order to determine the critical value of the inspection index ( gas pressure p and gas content W) of regional gas pre-drainage effect in three-soft unstable outburst coal seams in west Henan coal filed, the corresponding relationship between gas desorption index Δh2 and gas pressure p was constructed by establishing a laboratory experiment system, based on this relationship and the gas pressure p and gas content W which were measured in the region of gas outburst and gas dynamic phenomena occurrence, it was comprehensively deternimed that the critical value of the inspection index p and W of regional gas pre-drainage effect was respectively 0. 4 MPa and 5. 0 m3/t, which were then verified by the actual mining. These critical values are different from some existing regulations, and the research method and results can be used for reference to similar coal seams.
Keywords：gas drainagethree-soft coal seamgas pre-drainage indexcritical valueeffect evaluationwest Henan coal field
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：5( 54-58 )