Determination on Critical Value of Gas Content Based on Gas Adsorption and Desorption Experiment
CHEN Liang
LIU Mingju
WU Bing
WANG Yinkai
WANG Chao
Abstract：In order to determine the critical value of gas content and predict the coal and gas outburst region,a method to determine the critical value of gas content was provided based on the gas adsorption and desorption experiment.With the gas adsorption and desorption experiment,a relation formula between the gas pressure,gas content and the drilling cuttings desorption indexΔh2 was established,the critical value of the drilling cuttings desorption index Δh2 obtained in No. D6 seam of Pingmei No.1 Mine was 160 Pa and the relevant minimum gas content calculated was 5.04 m3/t whenΔh2 was in the critical value,which had good agreement with the gas content critical value of 5 m3/t preliminarily determined with Langmuir formula method. The engineering application showed that the method to determine the critical value of gas content based on the gas adsorption and desorption experiment was rational.
Keywords：regional predictioncritical value of gas contentgas adsorption and desorption experimentgas pressure
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 57-60 )