摘要：Acoustic emission has been recognized as a potentially advanced technique to monitor the efficiency of high-velocity waterjet rock drilling. Identification of AE multi-sources signals becomes fundamental to correlate AE singles and rock drilling efficiency. This paper presents a controlled experimental scheme and frequency analysis to identify different signal sources from waterjet impact and rock failure, respectively. Acoustic signals were decomposed into low, medium, and high-frequency signals by using the variational mode decomposition (VMD) approach. Results indicate that the waterjet impact generates a wideband acoustic signal. The frequency distribution of the high-frequency signals exhibited a strong diversity among four materials because of their different acoustic attenuation. Furthermore, the waterjet pressure did not change the frequency domain distribution of the material. An obvious reduction of the high-frequency signals was observed while waterjet rock drilling. Furthermore, the main frequency of high-frequency signals starts to be time-dependent that causes from the rock failure process. The high-frequency band presented a good correlation with the rate of penetration.

关键字：Acoustic emission Waterjet Rock failure

ISSN号：1365-1609

卷、期、页：卷: 115 页: 137-144

发表日期：2019-03-01

影响因子：2.268000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES

参与作者：张波

第一作者：盛茂,田守嶒,葛洪魁

论文类型：期刊论文

论文概要：盛茂,田守嶒,张波,葛洪魁，Frequency analysis of multi-sources acoustic emission from high-velocity waterjet rock drilling and its indicator to drilling efficiency，INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES，2019，卷: 115 页: 137-144

论文题目：Frequency analysis of multi-sources acoustic emission from high-velocity waterjet rock drilling and its indicator to drilling efficiency