摘要
为研究浅埋深倾斜工作面采空区自燃“三带”分布规律,以某矿24311缓倾斜工作面为研究对象,通过实验室实验确定了煤自然发火特征参数。对倾斜工作面上覆岩层垮落规律研究,将采空区分为5部分,对采空区氧浓度进行数值模拟,并与实测结果进行了对比。结果发现:24311工作面进风侧散热带宽度0~95 m,氧化升温带宽度95~213 m;回风侧散热带宽度0~48 m,氧化升温带宽度48~160 m,与实测结果基本一致。研究结果表明:分区模拟的手段可以更准确地对倾斜工作面自燃“三带”分布进行研究,同时也证明煤层倾角主要通过影响采空区孔隙率分布进而影响采空区自燃“三带”分布。
In order to study the distribution law of spontaneous combustion"three zones"in goaf of shallow buried inclined working face,24311 gently inclined working face of a mine was taken as the research object.The characteristic parameters of coal spontaneous combustion were determined by laboratory experiments.Based on the study of overburden caving law of inclined working face,the goaf is divided into five parts,and the oxygen concentration in the goaf is simulated by numerical simulation,and compared with the measured results.The results show that:the width of heat dissipation zone on the inlet side of 24311 working face is 0 to 95 m,and the width of oxidation temperature rise zone is 95 to 213 m;the width of heat dissipation zone on the return side is 0 to 48 m,and the width of oxidation temperature rise zone is 48 to 160 m.The results are basically consistent with the measured results,which shows that the zoning simulation method can more accurately study the"three zones"distribution of spontaneous combustion in inclined working face,and it also proves that the coal seam dip angle mainly affects the porosity distribution of goaf and then affects the distribution of spontaneous combustion"three zones"in goaf.
作者
王耀强
WANG Yao-qiang(Mine Safety Technology Branch of China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China)
出处
《煤炭技术》
CAS
北大核心
2021年第11期110-114,共5页
Coal Technology
基金
国家重点研发计划课题(2018YFC0807904,2018YFC0807902)。
关键词
倾斜工作面
孔隙率
自燃“三带”
数值模拟
inclined working face
porosity
spontaneous combustion"three zones"
numerical simulation
