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[1]高霞,王柏琨,赵宇贤,等.加载速率影响下含瓦斯水合物煤体力学性质离散元研究*[J].中国安全生产科学技术,2024,20(12):19-25.[doi:10.11731/j.issn.1673-193x.2024.12.003]
　GAO Xia,WANG Baikun,ZHAO Yuxian,et al.DEM research on mechanical properties of gashydrate bearing coal with different loading rates[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(12):19-25.[doi:10.11731/j.issn.1673-193x.2024.12.003]
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加载速率影响下含瓦斯水合物煤体力学性质离散元研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年12期
页码:
19-25
栏目:
学术论著
出版日期:
2024-12-30

文章信息/Info

Title:
DEM research on mechanical properties of gashydrate bearing coal with different loading rates
文章编号:
1673-193X(2024)-12-0019-07
作者:
高霞; 王柏琨; 赵宇贤; 吴强; 崔祥龙
（1.黑龙江科技大学 建筑工程学院，黑龙江 哈尔滨 150022；
2.黑龙江科技大学 安全学院，黑龙江 哈尔滨 150022；
3.浙江中科依泰斯卡岩石工程研发有限公司，浙江 杭州 311122)
Author(s):
GAO Xia;  WANG Baikun;  ZHAO Yuxian;  WU Qiang;  CUI Xianglong
(1.School of Architectural and Civil Engineering,Heilongjiang University of Science & Technology,Harbin Heilongjiang 150022,China;
2.School of Safety Engineering,Heilongjiang University of Science & Technology,Harbin Heilongjiang 150022,China;
3.Zhejiang Zhongke Itasca Rock Engineering R&D Co.,Hangzhou Zhejiang 311122,China)
关键词:
含瓦斯水合物煤; 加载速率; 离散元; 柔性边界; 不规则颗粒
Keywords:
gashydrate bearing coal; loading rate; discrete element method (DEM); flexible boundary; irregular particle
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2024.12.003
文献标志码:
A
摘要:
为了探究瓦斯水合物固化煤体后，加载速率对加固煤体力学性质的影响规律，提出1种柔性边界及不规则颗粒条件下含瓦斯水合物煤体的建模方法，并验证模型合理性，开展加载速率在0.005~0.25 mm/s范围内双轴数值试验。研究结果表明：含瓦斯水合物煤体应力-应变曲线呈应变硬化趋势且加载速率0.05 mm/s是其强度转折的临界加载速率；试样剪切带形态主要为“X”型并呈鼓胀破坏，随着加载速率的增加，试样鼓胀程度减小，破坏形态由局部破坏向整体破坏转变。研究结果可为深入认识含瓦斯水合物煤体力学性质提供参考。
Abstract:
In order to investigate the influence of loading rate on the mechanical properties of coal consolidated by gas hydrate,a modeling method of gashydrate bearing coal under the flexible boundary and irregular particle conditions was proposed,and the rationalityof modelwas verified.The double-axis numerical experiment was conducted with loading rates ranging from 0.005~0.25 mm/s.The results show that the stress-strain curve of gashydrate bearing coal exhibits a strain hardening trend,and the critical loading rate of 0.05 mm/s is the strength transition point.The morphology of the sample shear zone is mainly in the form of an “X” and shows a bulging failure.As the loading rate increases,the degree of bulging of the sample decreases,and the failure mode changes from local failure to overall failure.The research results can provide reference for further understanding the mechanical properties of gashydrate bearing coal.

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备注/Memo

备注/Memo:
收稿日期： 2024-07-11
* 基金项目： 国家自然科学基金项目（U21A20111，51974112）
作者简介： 高霞，博士，副教授，主要研究方向为瓦斯水合物衍生技术。
通信作者： 王柏琨，硕士研究生，主要研究方向为瓦斯水合物煤体离散元数值方法。
更新日期/Last Update: 2024-12-28