[1]翟小伟,徐 宇,于志金,等.松散煤体内CO2渗流规律试验[J].西安科技大学学报,2018,(03):375-382.[doi:10.13800/j.cnki.xakjdxxb.2018.0305]
 ZHAI Xiao-wei,XU Yu,YU Zhi-jin,et al.Study on seepage law of CO2in loose coal[J].Journal of Xi'an University of Science and Technology,2018,(03):375-382.[doi:10.13800/j.cnki.xakjdxxb.2018.0305]
点击复制

松散煤体内CO2渗流规律试验(/HTML)
分享到:

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年03期
页码:
375-382
栏目:
出版日期:
2018-05-15

文章信息/Info

Title:
Study on seepage law of CO2in loose coal
文章编号:
1672-9315(2018)03-0375-08
作者:
翟小伟12徐 宇12于志金12王 凯12吴世博12
1.西安科技大学 安全科学与工程学院,陕西 西安 710054; 2.西安科技大学 陕西省煤火灾害防治重点实验室,陕西 西安 710054
Author(s):
ZHAI Xiao-wei12XU Yu12YU Zhi-jin12WANG Kai12WU Shi-bo12
(1.College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Shaanxi Key Laboratory of Prevention and Control of Coal Fire,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
传质传热 非线性渗流 密度 渗透率 非达西因子
Keywords:
mass and heat transfer nonlinear seepage density permeability Non-Darcy factor
分类号:
TD 752
DOI:
10.13800/j.cnki.xakjdxxb.2018.0305
文献标志码:
A
摘要:
利用液态CO2进行煤矿火灾防治,具有显著的惰化降温效果,而松散煤体内CO2的渗流是分析其传质传热过程的基础。为分析承压状态下CO2气体的物性参数特征以及松散煤体内渗流规律,采用松散煤体渗透系数测定装置,对不同粒径、压注压力和孔隙率下CO2气体的渗透特性进行了试验。结果表明:松散煤体中的CO2渗流存在明显的非线性渗流特征,符合非达西理论; 孔隙率小的煤样压力梯度大于孔隙率大的煤样,颗粒间的空隙是渗流的主要通道; 相比于孔隙率和压力,煤体粒度是影响渗流特征关键因素,煤体粒径越小,CO2在松散煤体中渗流越困难; 压注压力越大,CO2密度和动力粘度越大,导致CO2在煤体中渗透率增大,而非达西因子减小,因此对CO2在松散煤体中的渗流影响不大。通过数据拟合,CO2的渗透率和非达西因子与孔隙率、粒径成幂指数关系,并得到了基于粒度和孔隙率下用于描述松散煤体内CO2气体渗流的一般理论方程。
Abstract:
The liquid CO2 is helpful for prevention and control of coal mine fire,which has a significant inert and cooling effect on the fire.And the seepage law of CO2 in loose coal is the basis for analyzing the process of heat and mass transfer.In order to analyze physical parameters of CO2 gas and its seepage law in loose coal under pressure conditions,an experimental apparatus for testing the permeability coefficient of loose coal is established and the permeation characteristics of CO2 gas are tested with the apparatus under different particle diameters of coal,pressures and porosities.The result shows that the seepage characteristics of CO2 in loose coal is obviously non-linear,which is in accord with non-Darcy theory; The pressure gradient of coal sample with small porosity is larger than that of coal sample with large porosity,and the gap between particles is the main channel of seepage; Compared with the porosity and pressure,the particle diameter of coal is a key factor influencing the seepage characteristics.The smaller the coal particle size,the more difficult it is for CO2 to seep in the loose coal; The density and the dynamic viscosity of CO2 increase with injection pressure,and the permeability of CO2 increases in the coal body while the non-Darcy factor decreases,so it has little effect on the seepage of CO2 in loose coal.Data fitting result indicates that both the permeability and the non-Darcy factor are exponentially related to porosity and particle size,and the general theoretical equation for describing CO2 gas seepage in loose coal is obtained based on particle size and porosity.

参考文献/References:

[1] 王德明.矿井火灾学[M].北京:中国矿业大学出版社,2008. WANG De-ming.Mine fires[M].Beijing:China University of Mining and Technology Press,2008.
[2] 文 虎,徐精彩,李 莉,等.煤自燃的热量积聚过程及影响因素分析[J].煤炭学报,2003,28(4):370-374. WEN Hu,XU Jing-cai,LI Li,et al.Analysis of coal self-ignite heat accumulating process and its effect factor[J].Journal of China Coal Society,2003,28(4):370-374.
[3] 王从陆,伍爱友,蔡康旭.煤炭自燃过程中耗氧速率与温度耦合研究[J].煤炭科学技术,2006,34(4):65-67. WANG Cong-lu,WU Ai-you,CAI Kang-xu.Research oncoupling between oxygen consumption rate and temperature during coal spontaneous combustion process[J].Coal Science and Technology,2006,34(4):65-67.
[4] 周春山.液态CO2在治理高瓦斯矿综放工作面自燃火灾的应用[J].煤矿安全,2012,43(9):149-151. ZHOU Chun-shan.The application of liquid carbon dioxide for coal spontaneous combustion in high gassy mine fully mechanized top-coal caving working face[J].Safety in Coal Mines,2012,43(9):149-151.
[5] 刘业献.液态CO2用于综放工作面自然发火治理的研究[J].煤炭科学技术,2014,42(9):119-122. LIU Ye-xian.Study on liquid carbon dioxide applied to spontaneous combustion control in fully-mechanized top coal caving mining face[J].Coal Science and Technology,2014,42(9):119-122.
[6]刘 赛,刘福义,王 刚,等.矿井采空区CO2防灭火技术发展展望[J].煤炭技术,2014,33(6):7-9. LIU Sai,LIU Fu-yi,WANG Gang,et al.Development outlook of mine fire control technology by using CO2 in coal mine goaf[J].Coal Technology,2014,33(6):7-9.
[7]蔡如法.液态二氧化碳治理封闭火区实践[J].中外企业家,2011(6X):132-133. CAI Ru-fa.Practice of closed fire area treatment for liquid carbon dioxide[J].Chinese and Foreign Entrepreneurs,2011(6X):132-133.
[8] 马 砺.二氧化碳防治煤自燃机理及应用工艺研究[D].西安:西安科技大学,2012. MA Li.Study on mechanism and application process of control coal spontaneous combustion by carbon dioxide[D].Xi'an:Xi'an University of Science and Technology,2012.
[9]李 宁,于志金,景巨栋,等.液体CO2直注封闭火区治理煤炭自燃技术应用[J].陕西煤炭,2017,36(1):104-107. LI Ning,YU Zhi-jin,JING Ju-dong,et al.Application of the technique of liquid CO2 direct injection for sealed fire zone to control coal spontaneous combustion[J].Shaanxi Coal,2017,36(1):104-107.
[10]LI Zong-xiang,LU Zhong-liang,WU Qiang,et al.Numerical simulation study of goaf methane drainage and spontaneous combustion coupling[J].International Journal of Mining Science and Technology,2007,17(4):503-507.
[11]郭 彪,侯吉瑞,赵凤兰,等.CO2在多孔介质中的运移规律研究[J].重庆科技学院学报:自然科学版,2009,11(2):76-78. GUO Biao,HOU Ji-rui,ZHAO Feng-lan,et al.A study of the migration rule of carbon dioxide in the porous media[J].Journal of Chongqing University of Science and Technology:Natural Science Edition,2009,11(2):76-78.
[12]林 杨,刘 杨,胡 雪,等.CO2在非均质多孔介质中的气窜与运移[J].石油化工高等学校学报,2010,23(2):43-46. LIN Yang,LIU Yang,HU Xue,et al.Gas channeling and migration of CO2 in the non-homogeneous porous media[J].Journal of Petrochemical Universities,2010,23(2):43-46.
[13]Porter M L,Plampin M,Pawar R,et al.CO2,leakage in shallow aquifers:a benchmark modeling study of CO2,gas evolution in heterogeneous porous media[J].International Journal of Greenhouse Gas Control,2015,39:51-61.
[14]Wang S,Vafai K,Mukhopadhyay S.Two-phase CO2,migration in tilted aquifers in the presence of groundwater flow[J].International Journal of Heat and Mass Transfer,2014,77(4):717-729.
[15]王继仁,张 英,郝朝瑜.半“O”型冒落采空区注CO2防灭火的数值模拟[J].中国安全科学学报,2015,25(7):48-54. WANG Ji-ren,ZHANG Ying,HAO Chao-yu.Numerical simulation of fire prevention in gob area with half O-ring risked falling by CO2injection[J].China Safety Science Journal,2015,25(7):48-54.
[16]邵 昊,蒋曙光,吴征艳,等.采空区注二氧化碳防灭火的数值模拟研究[J].采矿与安全工程学报,2013,30(1):154-158. SHAO Hao,JIANG Shu-guang,WU Zheng-yan,et al.Numerical simulation on fire prevention by infusing carbon dioxide into goaf[J].Journal of Mining and Safety Engineering,2013,30(1):154-158.
[17]郝朝瑜,王继仁,黄 戈,等.基于惰化降温耦合作用的采空区低温CO2注入位置研究[J].中国安全生产科学技术,2015,11(9):17-23. HAO Chao-yu,WANG Ji-ren,HUANG Ge,et al.Study on inject position of low temperature CO2 in gob based on coupling effect of inerting cooling[J].Journal of Safety Science and Technology,2015,11(9):17-23.
[18]Zhu W C,Liu J,Sheng J C,et al.Analysis of coupled gas flow and deformation process with desorption and Klinkenberg effects in coal seams[J].International Journal of Rock Mechanics and Mining Sciences,2007,44(7):971-980.
[19]吴国光,张永建,王光友,等.松散煤体中空气渗流规律的试验研究[J].煤炭科学技术,2009(8):42-45. WU Guo-guang,ZHANG Yong-jian,WANG Guang-you,et al.Test and study on air transfusion law in loose coal mass[J].Coal Science and Technology,2009(8):42-45.
[20]Klinkenberg L J.The permeability of porous media to liquids and gases[J].Socar Proceedings,1941,2(2):200-213.

备注/Memo

备注/Memo:
收稿日期:2017-08-10 责任编辑:刘 洁
基金项目:国家自然科学基金(51404195); 安全生产重大事故防治关键技术科技项目(Shanxi-0008-2016AQ); 陕西省自然科学基础研究计划(2017JQ5047)
通信作者:翟小伟(1979-),男,陕西富平人,博士,教授,E-mail:langran221@163.com
更新日期/Last Update: 2018-06-30