吸附平衡时间对瓦斯放散初速度的影响  

Adsorption Equilibrium Time Affected to Initial Velocity of Gas Emission

作　　者：谭蓉晖[1] 王兆丰[1,2] 杨宏民[1,2] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]瓦斯地质与瓦斯防治重点实验室国家培育基地,河南焦作454003

出　　处：《煤炭科学技术》2012年第5期46-48,共3页Coal Science and Technology

基　　金：国家自然科学基金资助项目(50974056);河南省重点攻关资助项目(092102310037)

摘　　要：安全生产行业标准AQ 1080—2009《煤的瓦斯放散初速度指标(Δp)测定方法》中规定的煤样吸附时间为90 min,为了验证该标准在具体应用中的局限性,选用5个煤矿挥发分相差较大的煤样进行瓦斯放散初速度测定试验,分析了吸附平衡时间对瓦斯放散初速度的影响,研究了不同变质程度煤样的吸附平衡时间对瓦斯放散初速度的影响规律。试验结果表明:煤的挥发分越低,所需的吸附平衡时间越长,瓦斯放散初速度的测值越高;瓦斯放散初速度受吸附平衡时间的影响较大,吸附平衡时间超过90 min后,瓦斯放散初速度仍在不断增加,最终趋于稳定。最后通过试验分析了现用标准对不同煤种的适用性,说明《煤的瓦斯放散初速度指标(Δp)测定方法》规定的吸附时间具有一定局限性,尤其对于高变质程度的煤样,其测值达不到吸附饱和值的要求,应适当延长吸附平衡时间。The adsorption time of coal sample stipulated in the safety production industrial standard AQ1080-2009 Measuring Method of Coal Gas Emission Initial Speed Index （Δp） was 90 min. In order to verify the limitation of the standard in certain application, the coal samples with different relative high volatile matters from five mines were selected to the measuring experiments of the gas initial emission speed. The paper analyzed the adsorption equilibrium time affected to the initial velocity of gas emission and studied the adsorption equilibrium time of different metamorphic degree coal samples to the influence law of the initial velocity of gas emission. The experiment results showed that the lower volatile matter of the coal, the longer of the adsorption equilibrium time required and the higher measured value would be. The initial velocity of gas emission was highly affected by the adsorption equilibrium time. When the adsorption equilibrium time was 90 min, the initial velocity of gas emission would be increased continuously and would be in stable finally. Finally, the suitability of the present available standard to different type coal was analyzed with test. The analysis showed that the adsorption time stipulated in Measuring Method of Coal Gas Emission Initial Speed Index （Δp） would have certain limitation. As for the high metamorphic degree coal sample, the measured value would not be reached the requirements of the adsorption saturation value and the adsorption equilibrium time should be properly expanded.

关 键 词：瓦斯放散初速度 吸附平衡时间 变质程度 挥发分 

分 类 号：TD712[矿业工程—矿井通风与安全]