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[1]史文豹,许庆钊,常聚才,等.不同含水率细砂岩软化效应及裂纹演化规律*[J].中国安全生产科学技术,2024,20(3):118-125.[doi:10.11731/j.issn.1673-193x.2024.03.017]
　SHI Wenbao,XU Qingzhao,CHANG Jucai,et al.Softening effect and crack evolution law of fine sandstone with different water contents[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(3):118-125.[doi:10.11731/j.issn.1673-193x.2024.03.017]
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不同含水率细砂岩软化效应及裂纹演化规律*
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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3期
页码:
118-125
栏目:
职业安全卫生管理与技术
出版日期:
2024-03-31

文章信息/Info

Title:
Softening effect and crack evolution law of fine sandstone with different water contents
文章编号:
1673-193X(2024)-03-0118-08
作者:
史文豹; 许庆钊; 常聚才; 苗壮; 李传明; 齐潮
（安徽理工大学 矿业工程学院，安徽 淮南 232001）
Author(s):
SHI Wenbao;  XU Qingzhao;  CHANG Jucai;  MIAO Zhuang;  LI Chuanming;  QI Chao
(School of Mining Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China)
关键词:
含水率; 软化效应; 单轴压缩; 脆性系数; 水平应变
Keywords:
moisture content;  softening effect;  uniaxial compression;  brittleness coefficient;  horizontal strain
分类号:
X936TD313
DOI:
10.11731/j.issn.1673-193x.2024.03.017
文献标志码:
A
摘要:
为研究深部坚硬顶板浸水后其力学特性及裂纹演化规律，以潘三矿区-810 m细砂岩为研究对象，开展不同含水率单轴压缩力学特性实验研究，分析其软化效应敏感程度及脆性系数，揭示不同含水率细砂岩裂纹演化规律。研究结果表明：细砂岩含水率与其脆性系数呈负相关，含水率的增加降低了其峰值应力、峰值应变和弹性模量，减弱了岩石的宏观破坏程度；在外部载荷持续作用下，含水率的增加是诱导孔隙水反力提前出现的关键因素，同时会促进细砂岩表面水平应变增长；细砂岩表面最大水平应变与其裂纹发育存在潜在联系，其表面宏观裂纹在最大水平应变区域出现。研究结果可为坚硬顶板注水软化机理研究提供一定参考。
Abstract:
In order to study the mechanical properties and crack evolution law of deep hard roof after immersion,taking the -810 m fine sandstone in Pansan mining area as the research object,the experimental study on the mechanical properties of uniaxial compression with different water contents was carried out.The sensitivity of softening effect and brittleness coefficient were analyzed,and the crack evolution law of fine sandstone with different water contents was revealed.The results show that the water content of fine sandstone is negatively correlated with its brittleness coefficient.The increase of water content reduces its peak stress,peak strain and elastic modulus,and weakens the macroscopic damage degree of rock.Under the continuous action of external load,the increase of water content is the key factor to induce the occurrence of pore water reaction force in advance,and it will promote the growth of horizontal strain on the surface of fine sandstone.There is a potential relationship between the maximum horizontal strain on the surface of fine sandstone and its crack development,and the macroscopic cracks on the surface appear in the maximum horizontal strain area.The research results can provide some reference for the softening mechanism research of hard roof water injection.

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备注/Memo

备注/Memo:
收稿日期： 2023-09-21
* 基金项目： 国家自然科学基金项目（52104117，52174105，52174103）；安徽省高校优秀科研创新团队项目（2023AH010023）
作者简介： 史文豹，博士，高级实验师，主要研究方向为矿山压力与岩层控制、巷道围岩支护、岩石力学。
通信作者： 许庆钊，硕士研究生，主要研究方向为矿山压力与岩层控制。
更新日期/Last Update: 2024-04-07