|本期目录/Table of Contents|

[1]邱兆云,潘一山,罗浩,等.有效围压对煤体破裂声发射信号影响研[J].中国安全生产科学技术,2015,11(4):47-53.[doi:10.11731/j.issn.1673-193X.2015.04.007]
 QIU Zhao-yun,PAN Yi-shan,LUO Hao,et al.Study on influence of effective confining pressure on acoustic emission signal in coal fracture[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(4):47-53.[doi:10.11731/j.issn.1673-193X.2015.04.007]
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有效围压对煤体破裂声发射信号影响研
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年4期
页码:
47-53
栏目:
学术论著
出版日期:
2015-04-30

文章信息/Info

Title:
Study on influence of effective confining pressure on acoustic emission signal in coal fracture
作者:
邱兆云潘一山罗浩杨月陈广阳
(辽宁工程技术大学 力学与工程学院,辽宁 阜新 123000)
Author(s):
QIU Zhao-yun PAN Yi-shan LUO Hao YANG Yue CHEN Guang-yang
(School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China)
关键词:
动力灾害声发射信号有效围压最小二乘法
Keywords:
dynamic disaster AE signal effective confining pressure least squares principle
分类号:
X936
DOI:
10.11731/j.issn.1673-193X.2015.04.007
文献标志码:
A
摘要:
含瓦斯煤体受载破裂声发射信号监测对煤与瓦斯突出等动力灾害预测研究具有重要意义。为了提高井下动力灾害预测准确性和及时性,在不同围压、不同孔隙压力条件,进行了煤体受载破裂声发射信号监测试验。结果表明:围压作用使声发射信号滞后且峰值增大,瓦斯压力使声发射信号首次高振铃计数提前;用围压和孔隙压力差值表示有效围压,通过引用有效围压,可以综合讨论围压和孔隙压力对声发射信号的影响,并且通过最小二乘法拟合发现有效围压与煤体破裂声发射信号峰值具有线性关系。利用有效围压与声发射信号的线性关系可以推导信号峰值,将信号峰值的30%设置为信号阀值,为煤与瓦斯突出等动力灾害预测提供一种新的方法。
Abstract:
Study on monitoring AE signals in loaded fracture of coal containing gas has important significance to forecast dynamic disaster, such as coal and gas outburst, etc. In order to improve the accuracy and timeliness of dynamic disaster forecast, in this paper, the monitoring tests on AE signals in coal loaded fracture under different confining pressure and pore pressure were conducted. The results showed that: the AE signal delays and the peak value increases under the effect of confining pressure, and the first high ringing counts of AE signal occurs earlier under the effect of pore pressure. The influence of confining pressure and pore pressure on AE signals was comprehensively discussed by quoting effective confining pressure that indicated by the difference value of confining pressure and pore pressure. By fitting with least squares principle, a linear relationship between effective confining pressure and peak value of AE signal in coal fracture was found, and the peak value of signal could be deduced by the above linear relationship. The 30% of peak value was set to be the threshold of signal, which provides a new method to forecast coal and gas outburst and other dynamic disaster.

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备注/Memo

备注/Memo:
国家重点基础研究发展计划(973)项目(2010CB226803);国家自然科学基金面上项目(11172121);国家自然科学基金面上项目(51204087)
更新日期/Last Update: 2015-04-30