IMECH-IR  > 流固耦合系统力学重点实验室
瓦斯煤岩变形破裂过程声发射预警信号变化规律研究
Alternative TitleAcoustic Emission Warning Signals Change Law Research during Deformation and Failure of Gassy Coal Rock
肖晓春; 朱洪伟; 潘一山; 徐军; 罗浩; 吕祥锋
Source Publication中国安全科学学报
2013-06-15
Volume23Issue:6Pages:122-127
ISSN1003-3033
Abstract为提高矿井瓦斯突出灾害预测准确率,基于力学、声学理论,采用实验室试验方法,以标准煤试样为研究对象,对含瓦斯煤岩变形破裂过程声发射(AE)预警声信号变化规律进行研究。试验结果表明:围岩应力增大,煤岩破裂由低围岩应力的脆性破坏逐渐过渡到高围岩应力状态的塑性破坏,可根据声发射高幅信号提前预测煤岩破裂时刻。瓦斯的力学和非力学作用对煤岩体力学性质和变形特性的影响均随瓦斯压力的增加而变大。瓦斯压力越大,则煤岩破裂进程加快,积累的声发射能量迅速释放,高值振铃计数声发射信号覆盖时间区段变长,声发射信号能及时反映含瓦斯煤岩的不稳定性。
Other AbstractIn order to improve the mine gas outburst prediction accuracy, AE warning signal variation in the process of gas-coal deformation and fracture was studied using laboratory experimental methods and standard coal samples. The study results show that after the confining pressure of coal increases, coal crack changes gradually from brittle failure under low confining pressure to ductile failure under high surrounding stress, that by the AE signal can predict the time of coal failure in advance, that the mechanical and non-mechanical effect of gas on the coal mechanical properties and deformation characteristics increase with the gas pressure increasing, that when gas pressure increases, coal cracks more rapidly, AE energy accumulated releases rapidly, time coverage period of AE signal high ring count value becomes longer, and that the AE warning signal can reflect gas-coal instability timely.
Keyword瓦斯煤岩 变形破裂 声发射(Ae) 振铃计数 预警信号
Subject Area岩体力学和土力学
URL查看原文
Indexed ByCSCD
Language中文
Funding Organization国家自然科学基金青年项目资助(51004061);2011年辽宁省教育厅科学研究一般项目资助(L2011049);国家大学生创新创业训练计划项目(201210147011)
CSCD IDCSCD:4909916
Citation statistics
Cited Times:7[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47518
Collection流固耦合系统力学重点实验室
Corresponding Author肖晓春
Recommended Citation
GB/T 7714
肖晓春,朱洪伟,潘一山,等. 瓦斯煤岩变形破裂过程声发射预警信号变化规律研究[J]. 中国安全科学学报,2013,23(6):122-127
APA 肖晓春,朱洪伟,潘一山,徐军,罗浩,&吕祥锋.(2013).瓦斯煤岩变形破裂过程声发射预警信号变化规律研究.中国安全科学学报,23(6),122-127.
MLA 肖晓春,et al."瓦斯煤岩变形破裂过程声发射预警信号变化规律研究".中国安全科学学报 23.6(2013):122-127.
Files in This Item: Download All
File Name/Size DocType Version Access License
IMCAS-J2013-291.pdf(1239KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[肖晓春]'s Articles
[朱洪伟]'s Articles
[潘一山]'s Articles
Baidu academic
Similar articles in Baidu academic
[肖晓春]'s Articles
[朱洪伟]'s Articles
[潘一山]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[肖晓春]'s Articles
[朱洪伟]'s Articles
[潘一山]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: IMCAS-J2013-291.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.