Results 61 to 70 of about 526 (181)

Effects of coal's initial macro-cracks on rockburst tendency of rock–coal composite samples [PDF]

Royal Society Open Science, 2019
In the present study, uniaxial compression tests were conducted on sandstone–coal composite samples to investigate the effects of original macro-cracks in coal on the rockburst tendency. First, the energy dissipation theory was used to derive the elastic
Shaojie Chen, Dawei Yin, Huimin Liu, Bing Chen, Ning Jiang   +4 more
doaj   +1 more source

Research Progress and Typical Cases of Deep Mines Backfill Technology in China

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
With the increasing depletion of shallow mineral resources and the growing demand for metals, deep mining has become a strategic focus for China. However, deep mining operations face a series of complex challenges, including high ground stress, elevated geothermal gradients, and severe rockburst hazards.
Shuai Li, Zhenyu Dan, Haoxuan Yu, Zhenzhong Xiang, Junyu Chen, Luyu Wang   +5 more
wiley   +1 more source

Self-initiated static-dynamic state transition behavior and triggering mechanism of strain rockburst using three-dimensional discrete element method

Underground Space
The accurate understanding of rockburst mechanism poses a global challenge in the field of rock mechanics. Particularly for strain rockburst, achieving self-initiated static-dynamic state transition is a crucial step in the formation of catastrophic ...
Yuan Qian, Cheng Zhao, Rui Wei, Rui Zhang, Lin Huang, Huiguan Chen   +5 more
doaj   +1 more source

Binary Segmentation Algorithm Selection and Hyperparameters Optimization of Blasted Rock Image

Journal of Engineering, Volume 2026, Issue 1, 2026.
Due to the severe noise and complex texture of blasted rock, selecting an appropriate binary segmentation algorithm is essential. This study evaluates nine common local thresholding methods for segmenting blasted rock images, with a focus on hyperparameter optimization of the highly adaptable Phansalkar algorithm.
Shihao Zhang, Qinpeng Guo, Shijiao Yang, Himadri Majumder   +3 more
wiley   +1 more source

Kinematic Limit Analysis of Roof Stability for Elliptical Tunnels in Rock Masses

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 16, Page 3880-3896, November 2025.
ABSTRACT Noncircular cross‐sections are commonly encountered in engineering practice; however, primary attempts to analyze roof stability have focused on circular and rectangular configurations. This study investigates the roof stability of elliptical tunnels with varying aspect ratios, employing two semi‐analytical approaches: piecewise linear and ...
Tae‐Won Seo, Dowon Park
wiley   +1 more source

Dynamic buckling mechanism of pillar rockbursts induced by stress waves

Journal of Rock Mechanics and Geotechnical Engineering, 2019
Rockbursts are sudden and violent rock failures that can lead to huge production and equipment losses, injury or death of mining workers. Buckling has been regarded as one of the key mechanisms of rockbursts, which are often induced by dynamic loads from mining excavations, such as drilling and blasting in underground mining.
J. Deng, N.S. Kanwar, M.D. Pandey, W.-C. Xie   +3 more
openaire   +2 more sources

Stress Relief Effects of Roof‐Cutting at the Junction Zone Between Gob‐Side Entry and Stope Within Extra‐Thick Coal Seams

Energy Science &Engineering, Volume 13, Issue 9, Page 4586-4602, September 2025.
The analytical model of severe ground pressure in JZGS: (a) Overlying rock strata structure above the stope and gob‐side entry; (b) in situ monitoring of advanced and lateral abutment pressures. Many studies have demonstrated that the overlying strata above the stope and gob‐side entry fracture and collapse at specific angles [28‐30], forming broken ...
Wenrui He, Fulian He, Wenli Zhai
wiley   +1 more source

Experimental Simulation Investigation on Slab Buckling Rockburst in Deep Tunnel

Applied Sciences
The relationship between slabbing failure and rockburst has become a hot issue in rockburst research. In this paper, the experimental system of impact rockburst is used to conduct a simulation experiment of rockburst induced by slab failure on ...
Chao Ren, Xiaoming Sun, Manchao He, Dongqiao Liu   +3 more
doaj   +1 more source

Log‐Periodic Power Law Singularities in Landslide Dynamics: Statistical Evidence From 52 Crises

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract Landslide movements typically show a series of progressively shorter quiescent phases, punctuated by sudden bursts during an acceleration crisis. We propose that such intermittent rupture phenomena can be described by a log‐periodic power law singularity model. Amounting mathematically to a generalization of the power law exponent from real to
Qinghua Lei, Didier Sornette
wiley   +1 more source

Experimental Simulation Investigation on Mechanism and Criterion of Impact‐Induced Rockburst in Gaoloushan Deep Tunnel

Energy Science &Engineering, Volume 13, Issue 8, Page 4252-4266, August 2025.
ABSTRACT During the excavation of a deep‐buried tunnel by the drilling and blasting method, the dynamic stress of blasting may cause the disorderly release of high energy in the rock mass during the blasting process of deep high‐energy rock. Blasting vibration is one of the main factors inducing dynamic disasters (such as rockbursts) in the surrounding
Chao Ren, Xiaoming Sun, Manchao He, DongQiao liu, JinKun Yang, Kunbo Zhang   +5 more
wiley   +1 more source