摘要
针对察哈素煤矿综采工作面正常回采期间上隅角频繁出现CO超限问题,通过选取察哈素主采的2号和3号煤层进行煤常温氧化实验,研究分析工作面CO来源及产生规律。通过实验得出工作面回采期间采空区内遗落的煤炭发生氧化产生的CO是工作面上隅角CO的主要来源,工作面采空区遗煤氧化产生的CO量与采空区漏风量及采空区内遗煤量等有直接关系。为此,针对性地提出了减少工作面采空区漏风、上隅角埋管抽放措施及加强CO气体监测监控的措施。现场应用结果表明,采取CO控制措施后,上隅角内的CO浓度处于15×10^(-6)~20×10^(-6),回风巷内的CO浓度处于15×10^(-6)~25×10^(-6),工作面回采期间未发生CO超限现象,为类似条件下综采工作面采空区CO治理及控制提供了参考,具有较大推广应用价值。
In view of the frequent occurrence of CO excess in the upper corner of the fully-mechanized working face of Chahasu Coal Mine during the normal mining period,the No.2 and No.3 coal seams mainly mined in Chahasu were selected to carry out the coal room temperature oxidation experiment,and the source and production of CO in the working face were studied and analyzed.Through the experiment,it was concluded that the CO produced by the oxidation of the coal left in the gob during the mining of the working face was the main source of CO at the corner of the working face.It was directly related to the amount of coal left in the goaf.For this reason,measures to reduce the air leakage in the goaf of the working face,the drainage measures of the buried pipe in the upper corner,and the measures to strengthen the monitoring and control of CO gas were put forward in a targeted manner.The field application results showed that after taking CO control measures,the CO concentration in the upper corner was 15×10^(-6)~20×10^(-6),and the CO concentration in the return air lane was 15×10^(-6)~25×10^(-6),no CO over-limit phenomenon occurred during the mining of the working face,which provided a reference for the control and control of CO in the goaf of the fully-mechanized working face under similar conditions,and had great application value.
作者
李磊
Li Lei(Energy Technology Development Co.,Ltd.,China Coal Science & Engineering Group Co.,Ltd.,Beijing 100000,China)
出处
《能源与环保》
2022年第1期40-45,57,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家自然科学基金资助项目(51674099)。
关键词
综采工作面
自然发火
CO超限
防灭火
常温氧化实验
fully-mechanized working face
spontaneous combustion
CO overrun
fire prevention and extinguishing
room temperature oxidation experiment
