高流态浆体材料固结微观力学性能研究

doi:10.16265/j.cnki.issn1003-3033.2025.05.0804

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (5): 116-123.doi: 10.16265/j.cnki.issn1003-3033.2025.05.0804

高流态浆体材料固结微观力学性能研究

郭鑫¹^,²(), 李大芳¹, 鲁义¹^,^**(), 施式亮¹, 李贺¹, 宋译¹

¹ 湖南科技大学资源环境与安全工程学院,湖南湘潭 411201
² 煤炭安全精准开采国家地方联合工程研究中心,安徽淮南 232001

收稿日期:2024-12-11 修回日期:2025-02-20 出版日期:2025-05-28
通信作者:
^** 鲁义(1986—),男,江西新干人,博士,教授,博士生导师,主要从事矿井灾害防治方面的研究。E-mail:luyijx@163.com。
作者简介:
郭鑫 (1994—),男,山东菏泽人,博士,副教授,主要从事矿井灾害防治等方面的研究。E-mail:guoxin190510@163.com。
郭鑫, 副教授
鲁义, 教授
施式亮, 教授
李贺, 教授
宋译, 讲师
基金资助:
国家自然科学基金资助(52174180); 湖南省杰出青年基金资助(2022JJ10026); 湖南省青年基金资助(2023JJ40284); 煤炭安全精准开采国家地方联合工程研究中心项目(EC2023019)

Research on microstructure mechanical properties of consolidation of high-fluid slurry materials

GUO Xin¹^,²(), LI Dafang¹, LU Yi¹^,^**(), SHI Shiliang¹, LI He¹, SONG Yi¹

¹ School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411201, China
² Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining, Huainan Anhui 232001, China

Received:2024-12-11 Revised:2025-02-20 Published:2025-05-28

摘要/Abstract

摘要： 为探究高流态浆体材料注浆后对煤体微观力学性能的影响,首先通过扫描电镜(SEM)扫描不同注浆材料注浆后与煤形成异质体的过渡区,并进行纳米压痕试验,进而分析高流态浆体材料对煤体微观结构特征以及微观力学性能的影响;然后,针对普通水泥材料注浆后,固结面存在的结构缺陷,分析高流态浆体材料对异质体过渡区的结构改性与力学强化机制。结果表明:高流态注浆材料与煤体过渡区的力学性能是异质体结构中最弱的区域,容易发生破断;高流态注浆材料与煤过渡区的压痕模量、压痕硬度,均随着注浆煤体结构面力学性能的提高而增大;普通水泥注浆后,与煤体过渡区的范围较大,晶体密度低,材料与煤体之间有明显的裂隙,微观力学性能较弱;高流态注浆材料注浆后,与煤过渡区的范围微观结构紧密,固结面过渡区的范围较小,界面过渡区(ITZ)微观力学性能较好,有助于提升瓦斯抽采钻孔抵御塌孔变形的能力。

关键词: 高流态浆体材料, 固结面, 力学性能, 异质体, 纳米压痕

Abstract:

In order to explore the effect of high fluid slurry materials on the micromechanical properties of coal, the transition area formed by different slurry materials and coal after grouting was scanned by scanning electron microscopy (SEM). Nanoindentation tests were carried out to analyze the effects of high fluid slurry materials on the microstructural characteristics and micromechanical properties of coal. Structural defects existed in the consolidated surface after grouting of ordinary cement materials. In view of this, the structural modification and mechanical strengthening mechanism of the transition area of the heterogeneous body were analyzed. The results show that the mechanical properties of the transition area between the high flow grouting material and the coal body are the weakest in the heterogeneous structure. This area is easy to break. The indentation modulus and indentation hardness in the transition zone between high flow grouting material and coal increase with the increase of mechanical properties of coal structure surface. After the ordinary cement grouting, the transition zone between the material and the coal body is large. The crystal density is low, there are obvious cracks between the material and the coal body, and the micromechanical properties are weak. After grouting, the high flow grouting material has close microstructure in the transition zone with coal. The transition zone with consolidated surface is small. Meanwhile, the interface transition zone (ITZ) has good micromechanical properties. These characteristics are helpful to improve the ability of gas extraction borehole deformation resistance.

Key words: high flow slurry materials, plane of consolidation, mechanical property, anisoplast, nano-indentation

中图分类号:

X936

郭鑫, 李大芳, 鲁义, 施式亮, 李贺, 宋译. 高流态浆体材料固结微观力学性能研究[J]. 中国安全科学学报, 2025, 35(5): 116-123.

GUO Xin, LI Dafang, LU Yi, SHI Shiliang, LI He, SONG Yi. Research on microstructure mechanical properties of consolidation of high-fluid slurry materials[J]. China Safety Science Journal, 2025, 35(5): 116-123.

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高流态浆体材料固结微观力学性能研究

Research on microstructure mechanical properties of consolidation of high-fluid slurry materials

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