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[1]李笑笑,马衍坤.真三轴煤层钻孔承载破坏层理效应试验研究*[J].中国安全生产科学技术,2024,20(3):97-102.[doi:10.11731/j.issn.1673-193x.2024.03.014]
　LI Xiaoxiao,MA Yankun.Experimental study on bearing failure bedding effect of coal seam boreholes in true triaxial environment[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(3):97-102.[doi:10.11731/j.issn.1673-193x.2024.03.014]
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真三轴煤层钻孔承载破坏层理效应试验研究*()
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年3期
页码:
97-102
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:
Experimental study on bearing failure bedding effect of coal seam boreholes in true triaxial environment
文章编号:
1673-193X(2024)-03-0097-06
作者:
李笑笑; 马衍坤
（1.安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室，安徽 淮南 232001；
2.安徽理工大学 煤矿深井开采灾害防治技术科技研发平台，安徽 淮南 232001；
3.安徽理工大学 矿山安全高效开采安徽省高校工程技术研究中心，安徽 淮南 232001）
Author(s):
LI Xiaoxiao;  MA Yankun
(1.Key Laboratory of the Ministry of Education for Safe and Efficient Mining of Coal Mines,Anhui University of Science and Technology,Huainan Anhui 232001;2.Science and Technology Research and Development Platform of Disaster Prevention and Control Technology for Coal Mine Deep Shaft Mining,Anhui University of Science and Technology;3.Anhui University Engineering and Technology Research Center for Safe and Efficient Mining,Anhui University of Science and Technology,Huainan Anhui 232001)
关键词:
可视化真三轴; 钻孔卸压; 层理; 数字图像相关分析; 声发射分析
Keywords:
visual true triaxial;  borehole pressure relief;  bedding;  digital image correlation analysis;  acoustic emission analysis
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2024.03.014
文献标志码:
A
摘要:
为探究层理对真三轴环境下煤层钻孔动态破坏特征影响，采用煤岩体单面可视真三轴试验仪器开展含层理煤层钻孔承载破坏试验，并结合数字图像相关和声发射分析方法进行研究。研究结果表明：试样破坏经历3个阶段，阶段Ⅰ，分析区域边缘剪切应变集中，孔壁破裂伴随煤颗粒弹射，声发射累计事件数和能量活跃性较低；阶段Ⅱ，孔周剪切应变场呈蝴蝶形状分布特征，孔壁两侧煤碎片弹射、煤块剥落，呈“V”形破坏，声发射累计事件数和能量活跃性较高；阶段Ⅲ，试样层理处剪切应变集中，出现宏观剪切裂纹，呈拱形分布特征，声发射累计事件数和能量活跃性强烈。研究结果对钻孔卸压机制研究具有参考意义。
Abstract:
In order to explore the influence of bedding on the dynamic failure characteristics of coal seam boreholes in true triaxial environment,the single-sided visual true triaxial test instrument of coal and rock mass was used to carry out the borehole bearing failure test of bedding coal seam,and the research was carried out combined with the digital image correlation and acoustic emission analysis method.The results show that the failure of sample can be divided into three stages.In stage Ⅰ,the shear strain is concentrated at the edge of analysis region,the hole wall fracture is accompanied by coal particle ejection,and the cumulative number of acoustic emission events and energy activity are low；In stage Ⅱ,the shear strain field around the borehole is in the shape of butterfly,the coal fragments on both sides of borehole wall are ejected,and the coal blocks peel off,presenting V-shaped failure,and the cumulative number of acoustic emission events and energy activity are high;In stage Ⅲ,the shear strain is concentrated at the bedding of sample,and the macroscopic shear cracks appear,which presents the characteristics of arch distribution,and the cumulative number of acoustic emission events and energy activity are strong.The research results are of reference significance for the study of borehole pressure relief mechanism.

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相似文献/References:

[1]耿敏敏,马占国,龚鹏,等.高应力煤巷卸压孔布置方式对卸压效果影响分析[J].中国安全生产科学技术,2012,8(11):5.
　GENG Min min,MA Zhan guo,GONG Peng,et al.Analysis of the effect on pressure relief by the pressure relieving hole layouts in high stress coal roadway[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(3):5.
[2]张寅,尹立冬,张季平,等.动力扰动下高应力巷道钻孔消能机制的数值研究*[J].中国安全生产科学技术,2023,19(9):61.[doi:10.11731/j.issn.1673-193x.2023.09.009]
　ZHANG Yin,YIN Lidong,ZHANG Jiping,et al.Numerical study on energy dissipation mechanism of high stress tunnel borehole under dynamic disturbance[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(3):61.[doi:10.11731/j.issn.1673-193x.2023.09.009]

备注/Memo

备注/Memo:
收稿日期： 2023-10-07
* 基金项目： 国家自然科学基金项目（52174161，52227901）；国家重点研发计划项目（2022YFC3004603）
作者简介： 李笑笑，硕士研究生，主要研究方向为煤岩动力灾害防治。
通信作者： 马衍坤，博士，教授，主要研究方向为煤岩动力灾害防治。
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