Study on Desorption Index Sensitivity of Drilling Cuttings from Tunlan Mine
GAO Xu
ZHANG Lang
WANG Dong
SHU Long-yong
Abstract：In order to establish and improve the coal and gas outburst prevention technical system of Tunlan Mine,relative sensitivities of drilling cuttings about gas desorption index K1 and Δh2 were determined.Based on high pressure set volume adsorption and desorption ex-periments and simulation measurement of the drilling cuttings desorption index,the study found that the gas adsorption balance pressure and gas desorption volume of each seam sample from Tunlan Mine was in a power function relationship,and K1 andΔh2 was in a liner rela-tionship.The first minute gas desorption volume of each seam sample from Tunlan Mine was more obvious than the fourth and fifth minute by the control function of desorption balance pressure.With the site measured of K1 and Δh2 and combined with the minimum mean vari-ance method analysis,the paper hold that the K1 of each seam in Tunlan Mine was more sensitive thanΔh2 index.Therefore,when predic-ting the outburst danger was conducted for each seam in Tunlan Mine,the drilling cutting desorption index K1 should be selected as the main index( sensitive index)and Δh2 should be selected as an auxiliary index.
Keywords：gas adsorptiongas desorptiondesorption index of drilling cuttingssensitivity
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：5( 41-44,116 )