摘要
采用试验模拟研究方法对大气压力、抽放负压以及通风负压3种影响因素对采空区瓦斯涌出的耦合作用机制进行了深入研究,探讨了"三个压力"影响下采空区瓦斯赋存及涌出瞬时影响特点及其规律。结果表明:采空区瓦斯涌出浓度对比地面大气压变化有一定的滞后效应,滞后时间平均为1 h左右,工作面通风量从990 m3/min上升到1 071 m3/min时,瓦斯涌出浓度较初值上升4%,随后下降至初值以下。
Experimental simulation method is used to research the coupling mechanism of influence factors such as atmospheric pres- sure, negative pressure of suction and ventilation negative pressure on gas emission in gob. The study discusses gas occurrence and e- mission instantaneous impact characteristics and laws under the influence of ＂three pressure＂. The test results show that gas emission concentration have a certain lag effect in contrast to large ground pressure, the average lag time is about 1 h, the ventilation rate work- ing face increased from 990 to 1 071 m3/min, gas emission concentration increased by 4% compared with the initial, then declined to the initial value below.
出处
《煤矿安全》
CAS
北大核心
2014年第2期5-7,共3页
Safety in Coal Mines
关键词
大气压力
抽放负压
通风负压
采空区
瓦斯涌出
atmospheric pressure
negative pressure of suction
ventilation negative pressure
gob
gas emission
