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[1]贾立锋,董擎,梁冰,等.循环载荷下煤样不同方向渗透特性试验研究[J].中国安全生产科学技术,2018,14(10):46-51.[doi:10.11731/j.issn.1673-193x.2018.10.007]
　JIA Lifeng,DONG Qing,LIANG Bing,et al.Experimental study on permeability of coal samples under cyclic lcoding in different directions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(10):46-51.[doi:10.11731/j.issn.1673-193x.2018.10.007]
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循环载荷下煤样不同方向渗透特性试验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年10期
页码:
46-51
栏目:
学术论著
出版日期:
2018-10-31

文章信息/Info

Title:
Experimental study on permeability of coal samples under cyclic lcoding in different directions
文章编号:
1673-193X(2018)-10-0046-06
作者:
贾立锋1; 董擎2; 梁冰3; 孙维吉3
(1.辽宁工程技术大学，矿业学院，辽宁 阜新 123000；2. 安阳工学院，机械工程学院，河南 安阳 455000；3. 辽宁工程技术大学，力学与工程学院，辽宁 阜新 123000）
Author(s):
JIA Lifeng1; DONG Qing2; LIANG Bing3; SUN Weiji3
（1. School of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China;2. School of Mechanical Engineering, Anyang Institute of Technology, Anyang Henan 455000, China;3. School of Mechanics and Engineering, Liaoning Technical University , Fuxin Liaoning 123000, China）
关键词:
循环载荷; 渗透率; 各向异性; 裂隙扩展; 孔隙压力
Keywords:
cyclic load;  permeability;  anisotropy;  crack propagation; pore pressure
分类号:
X936；TD712
DOI:
10.11731/j.issn.1673-193x.2018.10.007
文献标志码:
A
摘要:
针对循环采动过程中煤层不同方向渗透特征的演化规律问题，以平顶山十二矿己15煤层煤样为研究对象，利用自行研制的应力-渗流-解吸煤体变形试验装置，开展了循环围压加载下煤样不同方向渗透试验。研究结果表明：在相同的轴压、围压和平均孔隙压力下，试样平行层理面方向的渗透率大于垂直层理，平行层理面内的渗透率相差不大。在围压恒定的情况下，通过试样的流量随着渗透压差的增大而增大，且二者之间的关系可以用二次函数描述；围压增加，导致裂隙闭合，渗透率减小，当循环围压大于煤屈服强度和抗压强度时，裂隙扩展，渗透率增加；循环围压加载可以改变煤样原有不同方向渗透率大小顺序，渗透率与原初始渗透率比值随循环加载次数的增加而增大。
Abstract:
Aiming at the problem of coal seam permeability in different directions during cyclic mining process, taking coal samples of 15 coal seam the sixth of twelve mine in Pingdingshan as research object, using self developed stressseepagedesorption coal deformation test device, the permeability experiments of coal samples under different cyclic load were carried out. The results showed that, under the same axial pressure, confining pressure and average pore pressure, the coal permeability in the direction of parallel bedding plane is greater than that in the direction of vertical bedding, and the permeabilig in the parallel bedcling plane is not much different. In the case of constant confining pressure, the flow through the coal sample incrases with the increase of the osmotic pressure, and the relationship could be represented by quadratic function. With the increase of confining pressure, the fracture closes and the permeability decreases. When the cyclic confining pressure is greater than the coal yield strength and compressive strength, the fracture expands and the permeability increases. Cyclic confining pressure loading can change the original permeability order in different directions, and the ratio of permeability to original initial permeability increases with the increase of loading times.

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备注/Memo

备注/Memo:
收稿日期： 2018-08-09；数字出版日期：2017- -
基金项目： 博士科研启动基金项目(BSJ2018007)；国家重点发展计划项目（2016YFC0600704, 2016YFC0801404）
作者简介： 贾立锋，博士研究生，主要研究方向为气固耦合理论及其应用。
通信作者： 董擎，博士，讲师，主要研究方向为矿山废弃物污染治理。
更新日期/Last Update: 2018-11-07