神东矿区浅埋煤层地表漏风规律实验研究  

Experimental study on surface air leakage law of shallow-buried coal seam in Shendong mining area

作　　者：李龙 马灵军 张福成 张运增 白富强 王江龙 王宝富 常浩杰 LI Long;MA Lingjun;ZHANG Fucheng;ZHANG Yunzeng;BAI Fuqiang;WANG Jianglong;WANG Baofu;CHANG Haojie(China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719000,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]国能神东煤炭集团有限责任公司,陕西省榆林市719000 [2]中国矿业大学安全工程学院,江苏省徐州市221116

出　　处：《中国煤炭》2025年第4期46-54,共9页China Coal

基　　金：国家自然科学基金资助项目(52234006)。

摘　　要：针对神东矿区浅埋煤层采空区地表漏风测量困难的问题,在确定工作面及采空区参数的基础上,遵循相似实验基本定律,按照1∶120比例构建了采空区漏风流场模拟实验平台,并分析了工作面通风方式、地表漏风程度对采空区氧气浓度分布的影响。结果表明,抽出式与压入式通风模式下,地表存在漏风时的采空区氧气浓度相对更高;压入式相较抽出式氧气浓度升高幅度更大且对采空区的影响面积更大,但由于采空区内部煤岩体对风流的阻碍作用使得采空区顶层位置氧气由8%增至11%左右,浓度变化较小;抽出式地表漏风情况下,距底板0.9 m采空区最顶层处氧气浓度有较大增长,但影响的面积有限,表现为局部性影响,氧气浓度等值线呈现“漏斗形”分布。To address the challenges in measuring surface air leakage in goafs of shallow-buried coal seams in the Shendong mining area,an experimental platform with a scale of 1∶120 was constructed to simulate the goaf air leakage flow field.This platform was developed based on the parameters of the working face and goaf,adhering to the fundamental principles of similarity simulation experiments.The study analyzed the impacts of working face ventilation modes and surface air leakage intensity on oxygen concentration distribution within the goaf.Results indicate that under both exhaust and press-in ventilation modes,the oxygen concentration in gob areas with surface air leakage remains relatively higher.Compared to exhaust ventilation,the press-in ventilation mode demonstrates greater oxygen concentration elevation and broader affected areas in the goaf.However,due to airflow obstruction from coal-rock masses within the goaf,the oxygen concentration at the uppermost layer increases only modestly from approximately 8%to 11%,indicating limited variation in concentration levels.Under exhaust ventilation with surface air leakage,the oxygen concentration at the topmost layer of the goaf(0.9 m above the floor)shows a significant localized increase,with isolines exhibiting a funnel-shaped distribution,though the affected area remains limited.

关 键 词：浅埋煤层 地表漏风 相似模拟实验 氧气浓度分布 抽出式通风模式 压入式通风模式 

分 类 号：TD72[矿业工程—矿井通风与安全]