摘要
随着煤矿开采深度的增加,煤层温度也在逐渐升高,为研究温度对煤体孔裂隙内水分渗吸运移过程的影响,结合山西沁水县胡底煤矿实际温度情况,开展了25℃、45℃和65℃3个温度下煤体水分在线自发渗吸试验,测试得到了渗吸过程中T2谱演化曲线,并通过MRI成像,分析了不同温度对煤体内水分渗吸运移过程的影响。结果表明,随着温度的升高,水分子表面张力及动力学黏度降低,水进入煤体的阻力减小,而煤体孔裂隙表面能升高,对水分子的吸附能力增强,煤体的吸水量大幅增加,其中,65℃时吸水量最大,吸附态水占总吸水量的76.72%。研究结果对煤层注水技术措施的优化具有较好的指导作用,可以通过升高注水温度实现煤体的高效润湿。
With coal mining extending to greater depths,the temperature of coal seams increases,in order to investigate whether tempera-ture affects the process of water imbibition and migration in the pores and cracks of coal.Based on the actual temperature of Hudi Coal Mine,an online spontaneous imbibition test was conducted at 25℃,45℃,65℃.The study analyzed T2 spectral evolution curves,MRI imaging during im-bibition,and water migration laws across different temperatures.Results showed that surface tension and kinetic viscosity of water decreased as tem-perature increased,while the coal’s surface energy and imbibition capacity improved.At 65℃,water imbibition was highest,with adsorbed wa-ter accounting for 76.72%of the total.They provide valuable guidance for optimizing water injection in coal seams,suggesting that higher injection temperatures to enhance the coal’s wetting effect.
作者
宋佳妮
马衍坤
邓子墨
Song Jiani;Ma Yankun;Deng Zimo(Key Laboratory of Safe and Eff ective Coal Miming of Ministry of Education,Anhui,232001;Safe and Effi cient Mining Anhui University Engineering Technology Research Center,Anhui University of Science and Technology,Anhui,232001)
出处
《当代化工研究》
2025年第9期39-41,共3页
Modern Chemical Research
基金
云南省重点研发计划项目“极高应力强突出煤层群超大断面隧道安全高效揭煤基础理论与关键技术研究”(项目编号:202303AA080014)
国家自然科学基金项目“高瓦斯煤层顶板导向压裂跨界面造缝及缝网受扰机制”(项目编号:52174161)。
