STUDY OF ACOUSTIC EMISSION AND FRACTAL CHARACTERISTICS OF SOFT AND HARD COAL SAMPLES WITH SAME GROUPChinese Full Text
GAO Baobin;LI Huigui;LI Lin;WANG Xiaolei;YU Shuijun;Stage Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University;Opening Project of Key Laboratory of Deep Mine Construction,Henan Polytechnic University;College of Safety Science and Engineering,Henan Polytechnic University;
Abstract: In order to study of acoustic emission and fractal characteristics of soft and hard coal with same group under uniaxial compression,focusing on group Yi soft and hard coal in Pingmei Group,an experimental study is carried out to investigate the acoustic emission characteristics of soft and hard coal with the same group in Pingmei group by using RMT–150C rock mechanics test system and CDAE–1 acoustic emission instrument,and analyze the fractal characteristics of the acoustic emission count sequence. The results show that phenomenon of the acoustic emission cumulative count surge appears the soft and hard coal samples in failure process under compression uniaxial. The average growth rate is 855.4 of soft coal and the average growth rate is 914.32 of hard coal. Phase space dimension has a certain influence on the correlation dimension,but the effect will be more and more smaller with increasing of the phase space dimension. The fractal dimension is relatively small of acoustic emission cumulative count sequence of the soft and hard coal at the initial loading stage, and at the near peak stress it will reach the maximum value, and then it will appear dump phenomenon, at last it can be used as a forewarning of the instability failure of coal body.
Keywords：
mining engineering; coal sample; acoustic emission; uniaxial compression; fractal; correlation dimension;
- DOI：
10.13722/j.cnki.jrme.2014.s2.013
- Series：
- Subject：
- Classification Code：
TD311
- Mobile Reading
Read on your phone instantly
Step 1Scan QR Codes
"Mobile CNKI-CNKI Express" App
Step 2Open“CNKI Express”
and click the scan icon in the upper left corner of the homepage.
Step 3
Scan QR Codes
Read this article on your phone.
- CAJ Download
- PDF Download
Download the mobile appuse the app to scan this coderead the article.
Tips: Please download CAJViewer to view CAJ format full text.
Download: 812 Page: 3498-3504 Pagecount: 7 Size: 453K
Citation Network
Related Literature
- Similar Article
- Reader Recommendation
- Associated Author