浅埋综放工作面CO来源分析与防治技术
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摘要
针对浅埋厚煤层综放开采地表漏风严重、采空区遗煤易自燃以及工作面CO浓度超限影响安全生产的问题,基于串草圪旦煤矿6104综放工作面生产技术,采用现场实测、理论分析相结合,研究了地表漏风条件下浅埋厚煤层综放工作面CO浓度变化规律及其主要来源。研究表明:6104工作面上隅角CO浓度与采空区CO浓度、地表漏风强度正相关;6104工作面煤层及底板内赋存有CO并通过采动裂缝进入工作面,是工作面CO来源之一。结合工作面生产实际,提出了防治工作面CO浓度超限的技术措施。
In view of the serious surface air leakage, goaf coal spontaneous combustion and carbon monoxide concentration overrun affecting safety production in shallow fully mechanized caving face, field measurement and theoretical analysis were combined to study the variation law of carbon monoxide concentration and its main sources in shallow fully mechanized caving face under surface air leakage condition based on the production technology of 6104 fully-mechanized caving face in Chuancaogedan Coal Mine. The results show that the concentration of carbon monoxide at the corner of 6104 working face is positively correlated with the concentration of carbon monoxide in goaf and the strength of surface air leakage. Carbon monoxide occurs in coal seam and floor of 6104 working face, and it enters into working face through mining cracks, which is one of the sources of working face carbon monoxide. Based on the production practice of the working face, the prevention technology to control the over-limit of carbon monoxide concentration in working face is proposed.
In view of the serious surface air leakage, goaf coal spontaneous combustion and carbon monoxide concentration overrun affecting safety production in shallow fully mechanized caving face, field measurement and theoretical analysis were combined to study the variation law of carbon monoxide concentration and its main sources in shallow fully mechanized caving face under surface air leakage condition based on the production technology of 6104 fully-mechanized caving face in Chuancaogedan Coal Mine. The results show that the concentration of carbon monoxide at the corner of 6104 working face is positively correlated with the concentration of carbon monoxide in goaf and the strength of surface air leakage. Carbon monoxide occurs in coal seam and floor of 6104 working face, and it enters into working face through mining cracks, which is one of the sources of working face carbon monoxide. Based on the production practice of the working face, the prevention technology to control the over-limit of carbon monoxide concentration in working face is proposed.
引文
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[4]曹代勇,樊新杰,时孝磊,等.乌达煤田煤层自燃内因分析与自燃类型划分[J].煤炭学报,2005,30(3):288-292.
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[6]李东印,蒋东杰,贾海林.不连沟煤矿特厚煤层综放面采空区自燃“三带”分布规律[J].煤炭工程,2011,43(5):86-88.
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