浅埋厚煤层综采工作面采空区自燃“三带”划分

Division of goaf spontaneous combustion “three belts” on fully mechanized working face with shallow buried thick coal seam

采空区中氧气作为助燃物质,是造成采空区遗煤自燃的主要因素,而其主要来源为采空区漏风。为了探究采空区自燃“三带”和漏风规律,检测了氧气和一氧化碳的浓度分布情况。对苏家沟煤矿4109南工作面和4109工作面自开切眼至开采到一定范围内采空区氧气、一氧化碳等5种气体浓度变化的规律进行检测观察,根据现场生产实际和地质条件,对综采工作面推进速度、采空区自燃“三带”分布范围、5种气体的浓度关系和自燃危险区域的主要参数进行了分析和计算。研究结果为苏家沟煤矿综采工作面及相似工作面采空区自燃“三带”划分研究和遗煤自燃防治工作提供了一定借鉴。

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 opening the cutting hole to mining in a certain range in the goaf are measured and observed.This paper analyzed and calculated the advancing speed of fully mechanized mining face,the distribution range of “three zones” of spontaneous combustion 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.