摘要
基于不同压力,室温下对山西古交矿区马兰煤矿的煤样进行注水及吸附膨胀实验,分析了煤体吸附膨胀规律和气、水介质对其的控制机理.研究发现:不同含水率的煤样吸附后,煤体的应变参数随着压力的变化均呈现类似于Langumir等温吸附曲线的变化规律,且平行于层理方向的应变大于垂直于层理方向的应变;气、水介质从不同的侧面对煤体的吸附应变特征进行影响,煤样中注入的气量越大,产生的膨胀能越大,变形程度也越大;水分的存在,使得气体吸附量减小,煤体吸附气体后产生的应变减小.
Based on the adsorbing-swelling experiment on dry and different water-bearing coal samples from the Malan Mine of the Gujiao coalfield in Shanxi Province with injected water under different pressure and room temperature, the characteristics of adsorption-swelling deformation of these coal bodies were described. Additionally, the mechanism of gas and water medium on the swelling behavior was analyzed. The results show that strain parameters display a similar Langmuir-isothermal adsorption curve with the changes of pressure. The coal body strains parallel to the bedding direction are larger than those of perpendicular to the bedding after adsorbing of the coal samples with different water content. It is concluded that the factors that gas and water innuence the deformation characteristic of coal body are different. With the increasing of injection gas volume in the coal sample, the swelling energy becomes bigger and the deformation is bigger. The water occupation on effective absorption spot can lead to the weakness of coal adsorption capacity on gas, and the weakness of the expansion capacity invoking by the gas absorption.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第10期1310-1315,共6页
Journal of China Coal Society
基金
国家自然科学基金资助项目(40602017)
国家重点基础研究发展计划(973)基金资助项目(2006CB202204)
河南理工大学青年骨干教师资助计划资助项目(649047)
关键词
马兰煤
注水煤样
吸附膨胀
含水率
Malan coal
injection-water coal sample
absorption-swelling
water-bearing
