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[1]牛丽飞,曹运兴,石玢,等.潞安矿区煤层渗透率的各向异性特征实验研究[J].中国安全生产科学技术,2019,15(9):82-87.[doi:10.11731/j.issn.1673-193x.2019.09.013]
　NIU Lifei,CAO Yunxing,SHI Bin,et al.Experimental study on anisotropic characteristics of coal seam permeability in Lu’an mining area[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(9):82-87.[doi:10.11731/j.issn.1673-193x.2019.09.013]
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潞安矿区煤层渗透率的各向异性特征实验研究()
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年9期
页码:
82-87
栏目:
职业安全卫生管理与技术
出版日期:
2019-09-30

文章信息/Info

Title:
Experimental study on anisotropic characteristics of coal seam permeability in Lu’an mining area
文章编号:
1673-193X(2019)-09-0082-06
作者:
牛丽飞1; 2; 曹运兴3; 4; 5; 石玢3; 4; 5; 张震3; 4; 5; 贾天让1; 2
(1.河南理工大学 安全科学与工程学院，河南 焦作 454000；
2.河南理工大学 瓦斯地质研究所，河南 焦作 454000；
3.河南理工大学 煤层气/瓦斯地质工程研究中心，河南 焦作 454000；
4.中原经济区煤层/页岩气协同创新中心，河南 焦作 454000；
5.河南省非常规能源地质与开发国际联合实验室，河南 焦作 454000）
Author(s):
NIU Lifei1; 2;  CAO Yunxing3; 4; 5;  SHI Bin3; 4; 5;  ZHANG Zhen3; 4; 5;  JIA Tianrang1; 2
(1.School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454000;2.Institute of Gas Geology,Henan Polytechnic University,Jiaozuo Henan 454000;3.Coalbed Methane/Gas Geological Engineering Research Center,Henan Polytechnic University,Jiaozuo Henan 454000;4.Central Plains Economic Zone Seam/Shale Gas Collaborative Innovation Center,Jiaozuo Henan 454000;5.International Joint Laboratory of Unconventional Energy Geology and Development,Henan Province,Jiaozuo Henan 454000)
关键词:
煤; 渗透率; 各向异性; 层理; 应变; 有效应力
Keywords:
coal;  permeability;  anisotropy;  bedding;  strain;  effective stress
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2019.09.013
文献标志码:
A
摘要:
为了研究原位煤体渗透性的各向异性特征，以山西潞安常村矿3号煤层圆柱试样为对象，利用TCQT-Ⅲ型低渗煤层气相驱替增产试验装置，对煤样进行加载，并以氮气注入压力2.0 MPa的条件下，分析垂直层理和平行层理2个方向的煤体变形和渗透率变化特征。实验结果表明：煤样在加载过程中，平行和垂直层理煤样渗透率均随着有效应力的增大而减小，平行层理方向的渗透率始终大于垂直层理方向，应力加载初期渗透率急剧下降，最后逐渐趋于平缓；径向应变的增加量与渗透率呈正相关性，且平行层理相关性大于垂直层理；沿平行层理方向的裂隙度大于沿垂直层理方向，沿垂直层理方向的应变量大于沿平行层理方向；应变增加量均随有效应力的增加而逐渐减小。研究结果可为煤层井网布置及优化提供参考。
Abstract:
In order to study the anisotropic characteristics of insitu coal permeability,taking the cylinder samples from No.3 coal seam of Changcun Mine in Lu’an Shanxi as the objects,the TCQTⅢ test device of gas phase displacement for increasing production of low permeability coal seam was used for the loading of coal samples,and the change characteristics of coal deformation and permeability in the vertical bedding and parallel bedding directions were analyzed with the injection pressure of nitrogen as 2.0 MPa.The results showed that during the loading process of coal samples,both the permeability of coal samples with vertical bedding and parallel bedding decreased with the increase of effective stress,and the permeability in the parallel bedding direction was always larger than that in the vertical bedding direction.The permeability decreased sharply in the initial period of stress loading,and gradually tended to be flat at last.The increment of radial strain presented the positive correlation with the permeability,and the correlation of parallel bedding was larger than that of vertical bedding.The fracture degree along the parallel bedding direction was greater than that along the vertical bedding direction,and the strain along the vertical bedding direction was greater than that along the parallel bedding direction.Both the increment of strain decreased gradually with the increase of effective stress.The results can provide reference for the layout and optimization of coal seam well pattern.

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备注/Memo

备注/Memo:
收稿日期： 2019-06-06
* 基金项目： 中国博士后科学基金项目（2017M622343）；河南省博士后经费资助项目（001703047）；河南理工大学博士基金项目（B2016-03）
作者简介： 牛丽飞，硕士研究生，主要研究方向为瓦斯地质理论与应用。
通信作者： 曹运兴，博士,教授，主要研究方向为煤层气/瓦斯地质与煤层气开发技术。
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