降温促进煤体对瓦斯吸附效应的试验研究  

Experiment study on gas absorption effect promoted by temperature reducing of coal mass

作　　者：岳高伟[1,2] 王兆丰[2] 谢策[2] 李小军[2] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]河南理工大学安全科学与工程学院,河南焦作454000

出　　处：《煤炭科学技术》2016年第4期45-49,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51274090);河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放课题资助项目(WS2012B01);河南省科技攻关资助项目(142102310268);中国博士后科学基金资助项目(2013M531673)

摘　　要：为了减少煤样取心过程瓦斯漏失量和准确测定煤层瓦斯含量,提出了煤样冷冻取心技术,并开展了环境温度对煤体瓦斯吸附特性的影响研究。采用自制温控吸附装置,在20、-10、-20、-30℃条件下,对不同变质程度的无烟煤、贫煤、气肥煤的瓦斯等温吸附特性进行测试,分析环境温度对煤体瓦斯吸附特性影响,研究煤体降温对促进瓦斯吸附的影响规律。研究结果表明:煤体瓦斯饱和吸附量随温度降低线性增大,且随单位温度降低,气肥煤、贫煤和无烟煤饱和吸附量分别增大0.130、0.148、0.189 cm3/g。同时环境温度降低,随之瓦斯吸附平衡压力增大,煤体瓦斯吸附增量百分比先速减,而后缓减直至趋于稳定。降温促进了煤体对瓦斯的吸附,且环境温度越低,煤体对瓦斯的促吸效果越明显。同一吸附平衡压力下,降低单位温度瓦斯吸附增量百分比仅与煤的性质有关,与其温度环境无关。In order to reduce the gas leakage volume during the coring process of the coal sample and to accurately measure the gas content of the seam,a freezing coring technology of the coal sample was provided and a study was conducted on the environment temperature affected to the gas absorption features of the coal mass. Under the conditions of 20,-10,-20 and- 30 ℃,a self-made temperature controlled absorption device was applied to the measurement on the gas isothermal absorption features of different metamorphic degree anthracite coal,lean coal and gas fat coal. An analysis was conducted on the environment temperature affected to the gas absorption features of the coal mass and a study was conducted on the effect law of the coal temperature reduction to promote the gas absorption. The study results showed that the gas saturated absorption volume of coal would be increased in linear with the temperature reduced and when the unit temperature reduced,the saturated absorption volume of the gas fat coal,lean coal and anthracite coal would be individually increased by0. 130,0.148 and 0. 189 cm3/ g. When the environment temperature reduced,the gas absorption balance pressure increased,incremental percentage of gas absorption firstly would be rapidly reduced and then would be slowly reduced until in stable. The temperature reduction would promote the gas absorption and the lower environment temperature would be obviously promote the gas absorption effect of coal. Under the same absorption balance pressure,incremental percentage of gas absorption with unit temperature reduced would be only related to the coal property and could not be related to the temperature environment.

关 键 词：瓦斯 环境温度 变质程度 吸附量 

分 类 号：TD713[矿业工程—矿井通风与安全]