Journal ArticleDOI
Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure
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TLDR
In this paper, the authors explored the influence of methane to coal and studying fractal characteristics and acoustic emission (AE) features in the damage evolution, the triaxial compression experiments of coal containing methane were conducted, and the acoustic emission response was collected simultaneously in the loading process.About:
This article is published in Journal of Applied Geophysics.The article was published on 2016-01-01. It has received 113 citations till now. The article focuses on the topics: Acoustic emission & Correlation dimension.read more
Citations
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Mechanical behaviors and acoustic emission fractal characteristics of coal specimens with a pre-existing flaw of various inclinations under uniaxial compression
TL;DR: In this paper, the influence of hydraulic slotting inclination on the mechanical behaviors of coal seam during mining process, uniaxial compression experiments on coal specimens with a single pre-existing flaw inclined at 0°, 15°, 30°, 45°, 60°, 75°, 90° and intact specimens were conducted.
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Estimation of Crack Initiation and Propagation Thresholds of Confined Brittle Coal Specimens Based on Energy Dissipation Theory
TL;DR: A new energy-dissipation method to identify crack initiation and propagation thresholds is introduced in this article, which demonstrates that the crack initiation threshold was proportional to the peak stress (σ p) for ratios that ranged from 0.4351 to 0.4753σ p.
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Characterization of pore-fracture networks and their evolution at various measurement scales in coal samples using X-ray μCT and a fractal method
TL;DR: In this article, a simplified Sierpinski-like fractal model was proposed to further examine the evolution of the pore-fracture networks with higher measurement accuracy.
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Energy-Based Brittleness Index and Acoustic Emission Characteristics of Anisotropic Coal Under Triaxial Stress Condition
TL;DR: In this article, a new index for evaluating coal brittleness was established from the perspective of energy evolution during coal failure, and the applicability of the new index and the influence of the confining pressure and cleat orientation on the coal brittleness were analyzed.
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Classification and fractal characteristics of coal rock fragments under uniaxial cyclic loading conditions
TL;DR: In this paper, the authors used a servo-controlled testing system to investigate the fractal characteristics of coal rock fragments under different loading rates and found that most of the coal fragments are irregular wedges and bulks, exhibiting obvious shape characteristics.
References
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Journal ArticleDOI
Absorption and Adsorption of Methane and Carbon Dioxide in Hard Coal and Active Carbon
TL;DR: In this paper, a theoretical model of the sorption of small molecules in elastic submicroporous materials was proposed. But the model was not applied to hard coals and active carbon.
Journal ArticleDOI
Variation of methane adsorption property of coal after the treatment of hydraulic slotting and methane pre-drainage: A case study
TL;DR: In this article, the pore size distribution after the treatment of hydraulic slotting and methane pre-drainage was investigated by testing the seven coal samples obtained from the coal seam #10 of Yangliu Mine.
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Changes of acoustic emission and strain in hard coal during gas sorption–desorption cycles
Zofia Majewska,Jerzy Ziętek +1 more
TL;DR: In this paper, cylindrical coal samples were subjected to three successive cycles of sorption-desorption processes of a single gas (CO2, CH4). Acoustic emission (AE) and strains were simultaneously recorded during the sorption and desorption process.
Journal ArticleDOI
Fatigue cracks nucleation on steel, acoustic emission and fractal analysis
TL;DR: In this paper, a new acoustic emission (AE) diagnostic technique, for the study of fatigue cracks nucleation and propagation on steel, was investigated using the fractal analysis, and the box-counting method (BCM) in particular.
Journal Article
Fractal Theory and Its Applications
TL;DR: In this paper, the authors introduce the concept of fractal, the caculation of the fractal dimension, the methodology and prospect applications of fractality in various aspects, especially the propulsive effects in developments of science.
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