浅埋厚煤层综采工作面采空区自燃"三带"划分OA

Oxygen in the gob is the main factor that causes the spontaneous combustion of coal in the gob,and its main source is air leakage in the gob.In order to explore the"three zones"of spontaneous combustion and the law of air leakage in the goaf,the concentration distribution of oxygen and carbon monoxide is tested.The concentration changes of five gases,such as oxygen and carbon monoxide,in the 4109 south working face and 4109 working face of Sujiagou Coal Mine from o-pening the cutting hole to mining in a certain range in the goaf are measured and observed.This paper analyzed and calcu-lated the advancing speed of fully mechanized mining face,the distribution range of"three zones"of spontaneous combus-tion in goaf,the concentration relationship of five kinds of gases and the main parameters of spontaneous combustion danger area.The research results have theoretical guidance and reference significance for the study on the division of three zones of spontaneous combustion in fully mechanized mining face and similar working face of Sujiagou Coal Mine and the prevention of spontaneous combustion of abandoned coal.