摘要
本文对煤矿瓦斯治理中压入式与抽吸式通风方式对掘进面附近瓦斯浓度稀释规律进行了对比分析,主要考察两种通风方式对于瓦斯析出量出现变动的适应能力。结果发现:压入式通风方式在掘进面附近引起较大的漩涡流动,不利于瓦斯气体的稀释,而抽吸式通风方式则无明显涡流存在。传统压入式通风方式不能完全解决瓦斯析出变动带来的危险浓度区较大的问题,而采用抽吸式方式后,可有效避免该问题的出现。
Dilution process of the coal gas in the laneway with pressured-injection ventilation and extracted methods had been analyzed comparatively. The effect of both methods on the flexibility to the change of the coal gas release was paid more attentions. It was found that, with current pressuredinjection ventilation method, the obvious vortex flow could be formed near the mine face in the laneway, which is bad for the gas dilution. Same phenomena did not be found with extraction method. The pressured-injection method could not completely avoid the dangerous concentration resulted by the change of gas release. However, the extraction method has very good flexibility to the change of the gas release change.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第4期702-704,共3页
Journal of Engineering Thermophysics
基金
十一五国家科技支撑计划项目(瓦斯煤尘爆炸预防及继发性灾害防治关键技术)(No.2006038014004)
关键词
瓦斯
稀释
掘进巷道
压入式通风
抽吸式通风
coal gas
dilution
laneway
pressured-injection ventilation
extracted ventilation
