Experimental study on the characteristics of coal repeatedly oxidation and temperature variation under complex air leakage condition in enclosed area
PAN Rongkun
MA Gang
YU Minggao
WANG Shaokun
Abstract：In order to study the coal oxidation and temperature characteristics of complex air leakage in the underground fire zone,a big spontaneous combustion experimental platform was used and conducted the tests of coal oxidation and temperature characteristics under the conditions of continued leakage(air supply volume is 0.6 m3/h),micro-leakage(air supply volume is 0.6 m3/h→0) and intermittent leakage(air supply volume is 0.4,1.2,0.4 m3/h).The experimental obtains the impact properties of coal spontaneous combustion and temperature rising of wind flow for cooling and providing oxygen capacity under the continued leakage conditions,it was showed that "Breathing" phenomenon caused the oxidation and temperature mutation of coal.Especially after injection nitrogen replacing oxygen,the temperature of oxidation coal was very sensitive to repeated leakage;and the formation and evolution law of high temperature points were theoretically analyzed under the complex leakage condition.Through experiments the judgment rules of coal oxidation heat point are gotten in closed area,and a theoretical basis is provided for the spontaneous combustion controlling techniques in enclosed area.
Keywords：enclosed areacoal oxidationcomplex air leakage conditionhigh temperature point
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：6( 34-39 )