Characteristics of electromagnetic radiation signal of coal and rock under uniaxial compression and its field application

被引：20

作者：

Liu, Xiaofei ^{[1
]}

Zhang, Zhibo ^{[2
]}

Wang, Enyuan ^{[1
]}

Wang, Xiaoran ^{[1
]}

Yang, Bo ^{[1
]}

Wang, Hao ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Safety Engn, Key Lab Gas & Fire Control Coal Mines, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF EARTH SYSTEM SCIENCE | 2019年 / 129卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Rockburst; coal and rock; deformation; failure; electromagnetic radiation; Hurst index; EVOLUTION; STRESS; EMISSION; FRACTURE; FAILURE; EVENTS;

D O I：

10.1007/s12040-019-1309-0

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Rockburst is a serious threat to the safety and efficiency of coal-mine production in China. Accurate monitoring and prediction of rockburst is an ongoing challenge in coal mining. Electromagnetic radiation (EMR) technology is a real-time and non-contact prediction method for changes in the mechanical parameters of coal or rock. In this paper, uniaxial compression testing of coal and rock samples was carried out, EMR data were collected and analysed from deformation to failure. The rescaled range (R/S) analysis method was applied to study the Hurst index of the EMR signals during the uniaxial compression test. The results showed that the higher the degree of deformation and failure, the larger the Hurst index. On the basis of the experimental and theoretical results, the Hurst index of the EMR signal during the '8.11' rockburst in the Yuejin coal mine was analysed. The results showed that the Hurst index was low before the rockburst, and increased to 0.9 in the pre-rupture stage, then decreased 1-2 days before the rockburst. This suggests a correlation between EMR and the conditions leading to a rockburst event. Therefore, further study on the characteristics of EMR can contribute to development of early-warning technology for rockburst.

引用

页数：11

共 37 条

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