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[1]侯文光,秦金辉.动载荷下含水率对黄砂岩的分形特征及比表面能的影响[J].武汉工程大学学报,2021,43(03):307-312.[doi:10.19843/j.cnki.CN42-1779/TQ.202008007]
 HOU Wenguang,QIN Jinhui.Influence of Water Content on Fractal Characteristics and Specific Surface Energy of Yellow Sandstone under Dynamic Loading[J].Journal of Wuhan Institute of Technology,2021,43(03):307-312.[doi:10.19843/j.cnki.CN42-1779/TQ.202008007]
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动载荷下含水率对黄砂岩的分形特征及比表面能的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
43
期数:
2021年03期
页码:
307-312
栏目:
资源与环境工程
出版日期:
2021-06-30

文章信息/Info

Title:
Influence of Water Content on Fractal Characteristics and Specific Surface Energy of Yellow Sandstone under Dynamic Loading
文章编号:
1674 - 2869(2021)03 - 0307 - 06
作者:
侯文光1秦金辉2
1. 霍州煤电李雅庄煤矿,山西 霍州 031400;2. 河南理工大学安全科学与工程学院,河南 焦作 454003
Author(s):
HOU Wenguang1 QIN Jinhui2
1. Huozhou Coal and Electricity Liyazhuang Coal Mine,Huozhou 031400,China;2. School of Safety Science and Engineering,Henan Polytechnic University, Jiaozuo 454003, China
关键词:
动载荷含水率黄砂岩分形特征比表面能
Keywords:
dynamic load water content yellow sandstone fractal features specific surface energy
分类号:
TB122
DOI:
10.19843/j.cnki.CN42-1779/TQ.202008007
文献标志码:
A
摘要:
为了研究含水率对动载荷作用下黄砂岩比表面能的影响,首先设计了6种不同含水率(η=1.8%、2.1%、2.4%、2.7%、3.0%、3.3%)黄砂岩,对该批次黄砂岩利用霍普金森压杆在0.21 MPa气压下进行动态冲击;其次,对试验后碎块进行筛分,利用分形维数法探究其分形维数随含水率变化关系;最后,将不同粒径的碎块转化为该粒径范围内的球体,利用球表面积与耗散能获得黄砂岩的比表面能随含水率的变化关系。结果表明:随着含水率的升高,黄砂岩的粒径变小(由32.56 mm减小至16.83 mm),减少了48.31%,分形维数变大(由1.875 0增大至2.316 3),增加了23.54%;黄砂岩碎块的表面积增大(由169.89 cm2增加至510.00 cm2),增加了200.19%,比表面能下降(从0.06 J·cm-2到0.01 J·cm-2),减少了83.59%。
Abstract:
To study the influence of water content on the specific surface energy of yellow sandstone under dynamic load,six types of yellow sandstone with different water contents (η=1.8%,2.1%,2.4%,2.7%,3.0%,3.3%) were firstly designed and dynamically impacted by Hopkinson pressure bar under the pressure of 0.21 MPa. Secondly,the fragments after the tests were screened,and their fractal dimensions were studied by the fractal dimension method. The relationship between the fractal dimension and the water content was then built. Finally,the fragments of different particle sizes were converted into spheres within the particle size range, and the relationship between the specific surface energy of yellow sandstone and the water content was obtained by using the surface area of the sphere and the dissipation energy. The results show that with the increase of water content,the particle sizes of yellow sandstone decreases from 32.56 mm to 16.83 mm,with a decrease of 48.31%,and the fractal dimension increases from 1.875 0 to 2.316 3,increasing by 23.54%; the surface area of yellow sandstone fragments increases from 169.89 cm2 to 510.00 cm2,with an increase of 200.19%,and specific surface energy decreases from 0.06 J·cm-2 to 0.01 J·cm-2,decreasing by 83.59%.

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相似文献/References:

[1]李险峰.含水率对金坪子滑坡土体力学特性的影响[J].武汉工程大学学报,2012,(3):27.
 LI Xian\|feng.Impact of moisture content on mechanical properties of Jinpingzi slip soil[J].Journal of Wuhan Institute of Technology,2012,(03):27.

备注/Memo

备注/Memo:
收稿日期:2020-08-05基金项目:霍州煤电集团有限责任公司李雅庄煤矿地面地震勘探项目(18060601)作者简介:侯文光,硕士,高级工程师。E-mail:2499016192@qq.com引文格式:侯文光,秦金辉. 动载荷下含水率对黄砂岩的分形特征及比表面能的影响[J]. 武汉工程大学学报,2021,43(3):307-312.
更新日期/Last Update: 2021-06-28