[1]张天军,陈佳伟,武振虎,等.2种典型嵌挤骨架配比下混合煤样的渗透特性[J].西安科技大学学报,2019,(03):388-394.[doi:10.13800/j.cnki.xakjdxxb.2019.0302]
 ZHANG Tian-jun,CHEN Jia-wei,WU Zhen-hu,et al.Permeability of mixed coal samples with two typical intercalated skeleton ratios[J].Journal of Xi'an University of Science and Technology,2019,(03):388-394.[doi:10.13800/j.cnki.xakjdxxb.2019.0302]
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2种典型嵌挤骨架配比下混合煤样的渗透特性(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2019年03期
页码:
388-394
栏目:
目次
出版日期:
2019-05-30

文章信息/Info

Title:
Permeability of mixed coal samples with two typical intercalated skeleton ratios
文章编号:
1672-9315(2019)03-0388-07
作者:
张天军1陈佳伟1武振虎2李宏斌2蒋兴科1彭文清 1庞明坤1
(1.西安科技大学 理学院,陕西 西安 710054; 2.陕西省瓦斯督导组,陕西 西安 710054)
Author(s):
ZHANG Tian-jun1CHEN Jia-wei1WU Zhen-hu2LI Hong-bin2 JIANG Xing-ke1PENG Wen-qing1PANG Ming-kun1
(1.College of Sciences,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Shaanxi Gas Steering Group,Xi'an 710054,China)
关键词:
骨架配比 轴向压缩位移 渗透率 有效孔隙通道
Keywords:
skeleton ratio axial compression displacement permeability effective pore channel
分类号:
TU 45
DOI:
10.13800/j.cnki.xakjdxxb.2019.0302
文献标志码:
A
摘要:
基于轴向压缩位移控制法,利用破碎岩体渗透试验系统,测试了破碎煤样在采用单级嵌挤骨架和级配嵌挤骨架2种配 比方式下,承压过程中的渗透特性。结果表明:级配嵌挤骨架煤样压缩过程中,随着20~25 mm含量的增高,渗透率出现明显 的平稳变化阶段,说明大煤样颗粒对骨架具有显著的支撑作用,造成煤样内部有效孔隙通道保持平稳; 以5~10 mm为主的 单级配嵌挤骨架其渗透率远小于其他3组,说明小颗粒煤样对较大煤样颗粒之间的空隙具有良好的充填作用; 2种配比方式 下,孔压梯度与渗流速度两者之间的二次拟合系数都高达0.94以上,说明煤样压实渗流过程中都满足Forchheimer方程; 通 过建立的物理模型发现煤样压缩过程中存在侧向约束阻力,其值随轴向压缩位移、渗透压的增大而增大。
Abstract:
Based on the axial compressive displacement control method,the permeability characteristics under pressure of crushing coal samples were tested under the two kinds of mixing modes of single-stage in-frame and cascade-in-frame.The results show that the permeability shows a significant phase of steady change during the compression process of coal samples in the cascades with the increase of 20~25 mm,which indicates that the large particle coal samples have a significant supporting effect on the skeleton,resulting in the pore channel remained stable.The permeability of single-stage in-frame with 5~10 mm is much less than that of the other three groups,which indicates that small particle coal has a good filling effect on the gap between larger coal particles.The two fitting coefficients of pore pressure gradient and seepage velocity are both above 0.94 under the two kinds of proportioning modes,which means that the Forchheimer equation is satisfied during the compaction seepage of coal sample.We have found there is lateral restraint resistance during compression process through the established physical model,its value increases with the axial compression displacement and osmotic pressure.

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备注/Memo

备注/Memo:
收稿日期:2018-06-10 责任编辑:刘 洁 基金项目:国家自然科学基金(51374168,51774234,51474172) 通信作者:张天军(1971-),男,陕西临潼人,教授,博士生导师,E-mail:tianjun_zhang@126.com 张天军,陈佳伟,武振虎,等.2种典型嵌挤骨架配比下混合煤样的渗透特性[J].西安科技大学学报,2019,39(3):388-394. ZHANG Tian-jun,CHEN Jia-wei,WU Zhen-hu,et al.Permeability of mixed coal samples with two typical intercalated skeleton ratios[J].Journal of Xi'an University of Science and Technology,2019,39(3):388-394.
更新日期/Last Update: 2019-05-30