|本期目录/Table of Contents|

[1]贾炳,魏建平,温志辉.峰值前后多次加载下煤样声发射特征[J].中国安全生产科学技术,2016,12(4):5-9.[doi:10.11731/j.issn.1673-193x.2016.04.001]
 JIA Bing,WEI Jianping,WEN Zhihui.Acoustic emission characteristics of coal samples under multiple loading processes before and after the peak value[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(4):5-9.[doi:10.11731/j.issn.1673-193x.2016.04.001]
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峰值前后多次加载下煤样声发射特征
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年4期
页码:
5-9
栏目:
学术论著
出版日期:
2016-04-30

文章信息/Info

Title:
Acoustic emission characteristics of coal samples under multiple loading processes before and after the peak value
作者:
贾炳12魏建平123温志辉12
(1.河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地,河南 焦作 454000;
2.河南理工大学 安全科学与工程学院,河南 焦作 454000;
3.煤炭安全生产河南省协同创新中心,河南 焦作 454000)
Author(s):
JIA Bing12 WEI Jianping123 WEN Zhihui12
(1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo Henan 454000, China;
2. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China;
3. Coal Production Safety Collaborative Innovation Center in Henan Province, Jiaozuo Henan 454000, China)
关键词:
岩石力学加卸载声发射实验
Keywords:
rock mechanics loading and unloading acoustic emission experiment
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2016.04.001
文献标志码:
A
摘要:
掌握峰值前后多次加载下煤样声发射变化规律,对研究煤矿开采中不同变形部位煤岩裂缝演化至关重要。利用RMT-150B型岩石力学实验系统以及CDAE-1全数字化声发射检测及分析系统,采取焦作矿区煤样进行了峰值前后多次加载下的应力-应变-声发射测试实验。测试结果显示:首次加载时声发射参数呈现“渐变性”的变化特征,随后加载时声发射变化呈现“分段性”特征。并且随着加载次数的增加煤岩的Felicity效应逐渐增强,体现了煤岩记忆的超前性。同时,随着加载次数的增加,煤样时间-声发射曲线较时间-应力曲线的滞后性逐渐增强。这些特征的研究可以为煤矿井下地质灾害的监测、预测提供指导。
Abstract:
For studying the evolution of coal and rock fractures at different deformation sites in mining of coal mine, it is vitally important to grasp the variation laws of acoustic emission for coal samples under multiple loading processes before and after the peak value. By using the RMT-150B rock mechanics test system and CDAE-1 all-digital acoustic emission detection and analysis system, the test experiments on stress, strain and acoustic emission were conducted on coal samples of Jiaozuo mine area under multiple loading processes before and after the peak value. The results showed that in the first loading process, the acoustic emission parameters presented the change characteristic of graduality, while in the subsequent loading process, the change of acoustic emission presented the characteristic of segmentation. With the increase of loading times, the effect of Felicity increased gradually, which reflects the advance of coal memory. At the same time, with the increase of loading times, the hysteresis for curves of time-acoustic emission increased gradually compared with the curves of time-stress. It can provide guidance for the monitoring and prediction of geological disaster in underground coal mine.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51574112,51404100);教育部科学技术研究重点项目(213022A);河南省科技创新杰出青年基金项目(164100510013);河南理工大学博士基金项目(B050201)
更新日期/Last Update: 2016-05-05