Journal ArticleDOI
Extracting acoustic emission features that precede hard rock instability with unsupervised learning
TLDR
In this article , acoustic emission (AE) signals were acquired, and their clustering features were automatically extracted by the clustering unsupervised learning method, which showed that a class of AE signals featured high rise time, high ring count, high energy and low peak frequency and low quantity can be used as an indicative precursor feature of hard rock instability.About:
This article is published in Engineering Geology.The article was published on 2022-06-01. It has received 9 citations till now. The article focuses on the topics: Acoustic emission & Instability.read more
Citations
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Journal ArticleDOI
Experimental investigation on the influence of a single structural plane on rockburst
TL;DR: In this article , a series of biaxial compression tests are performed to simulate the rockburst process, followed by a detailed analysis of the strength characteristics, the strain field, the rock-burst evolution process, and the microscopic characteristics of fracture surfaces.
Journal ArticleDOI
Study of mechanical behavior and cracking mechanism of prefabricated fracture cemented paste backfill under different loading rates from the perspective of energy evolution
TL;DR: In this paper , uniaxial compressive strength (UCS) tests with different levels of LRs were conducted on 0°, 45°, 90° prefabricated fracture CPBs (PFCPB), and the results showed that UCS and elastic modulus of the filling body were positively correlated with loading rate and initial defects.
Journal ArticleDOI
Loading rate dependence of staged damage behaviors of granite under uniaxial compression: Insights from acoustic emission characteristics
TL;DR: A series of laboratory-based uniaxial compression tests combined with acoustic emission (AE) monitoring was conducted to investigate the loading rate dependence of AE characteristics and the damage process of granite as mentioned in this paper .
Journal ArticleDOI
The Infrared Radiation Characteristics of Sandstone Fracture Seepage under Coupled Stress-Hydro Effect
Ruoyu Cui,K. Cao,Xinci Li,Rana Muhammad Asad Khan,Naseer Muhammad Khan,Wei Liu,Qiang-Ye Gao,Fa-Gang Wang,Yuan-Ze Yang,Jiangbo Quan,Saad Saud Alarifi +10 more
TL;DR: In this paper , the influence of coupled stress-hydro effect of infrared radiation change on sandstone surface was analyzed using multiple infrared radiation indexes (ΔAIRT, IRV, VDIIT) and image data.
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The variation of micro-current in rock under loads and its microcosmic influence mechanism
TL;DR: In this paper , an electrical and mechanics experimental system of rock was established to explore the change rules of microcurrents generated in the loading process of rocks and the microscopic influence mechanisms.
References
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Journal ArticleDOI
An examination of procedures for determining the number of clusters in a data set
TL;DR: A Monte Carlo evaluation of 30 procedures for determining the number of clusters was conducted on artificial data sets which contained either 2, 3, 4, or 5 distinct nonoverlapping clusters to provide a variety of clustering solutions.
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Frequency of earthquakes in California
TL;DR: In this article, a statistical comparison of earthquake frequency in California with that of the world as a whole was made by comparing the historical record of the earthquake frequency of California with the global average.
Journal ArticleDOI
Crack classification in concrete based on acoustic emission
Kentaro Ohno,Masayasu Ohtsu +1 more
TL;DR: In this article, two crack classification methods are compared and discussed from results of three types of concrete failure tests, and it is shown that the ratios of the shear crack which are identified by Green's functions for moment tensor analysis are good agreement with those by parameter analysis in the case that the proportion of the RA value and the average frequency is set to 1-200.
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Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions
Manchao He,J.L. Miao,J.L. Feng +2 more
TL;DR: In this paper, a single-face dynamic unloading tests under true-triaxial condition were carried out for Paleozonic marine sedimentation limestone samples produced by blocks cored from 1140m depth in Jiahe coal mine of China.
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Case Histories of Four Extremely Intense Rockbursts in Deep Tunnels
TL;DR: In this article, the authors described the characteristics and mechanisms of four typical events of rockbursts and their temporal and spatial characteristics in detail, and the responses of support elements were also analyzed.