摘要
为解决金桥煤矿1308采煤工作面上部采空区遗煤自然发火威胁,采用试验、数学模型分析手段对工作面自然发火规律进行研究,确定了1308工作面自然发火标志性气体为CO、C_2H_2,最短自然发火期为66天,氧化带长度为47.9 m.提出了避免发火的预控措施,1308工作面日推进度必须超过1.31 m,注氮时注氮孔长度为35 m.
In order to solve the coal spontaneous combustion threat in the goaf above 1308 face in Jinqiao Coal Mine, the experimental and mathematical model methods were used to study the combustion law of the working face, and the significant gas for spontaneous combustion was identified as CO and C2H2, the combustion period is 66 days, and the oxidation zone length is 47.9 m. Pre-control measures to avoid spontaneous combustion are proposed. The daily mining advancing in 1308 working face must exceed 1.31 m, and the length of nitrogen injection hole should be 35 m or larger when nitrogen is injected.
作者
曲柱
胡强强
孙庆鹏
QU Zhu;HU Qiangqiang;SUN Qingpeng
出处
《山西焦煤科技》
2019年第1期21-25,共5页
Shanxi Coking Coal Science & Technology
关键词
采空区
自然发火
氧化带
最短自然发火期
推进速度
注氮
Goaf
Spontaneous combustion
Oxidation zone
Shortest spontaneous combustion period
Advancing speed
Nitrogen injection
