Results 61 to 70 of about 504 (182)

Mechanism of rockburst induced by the microseismic event in the floor strata of high tectonic stress zones: A case study

International Journal of Coal Science & Technology
With the increase of mining scope, rockburst occurs frequently, but its generation mechanism has not been understood comprehensively. Based on a rockburst in the coal pillar area of high tectonic stress zones (HTSZs), this study analyzed the distribution
Songwei Wang, Anye Cao, Changbin Wang, Wenhao Guo, Chengchun Xue, Jian-gang Liu, Xuesong Wu, Gangsheng Shi   +7 more
doaj   +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

Performance evaluation of rock fragmentation prediction based on RF‐BOA, AdaBoost‐BOA, GBoost‐BOA, and ERT‐BOA hybrid models

Deep Underground Science and Engineering, Volume 4, Issue 1, Page 3-17, March 2025.
Hybrid rock fragmentation prediction models were developed by the combination of four machine learning methods and a Bayesian optimizer. Also, the prediction capabilities of the prediction models were evaluated based on R2, the root mean square error, and the mean absolute error.
Junjie Zhao, Diyuan Li, Jian Zhou, Danial J. Armaghani, Aohui Zhou   +4 more
wiley   +1 more source

Experimental Investigation of the Dynamic Impact Failure of Bolted Rock With Different Anchoring Angles

Energy Science &Engineering, Volume 13, Issue 2, Page 752-764, February 2025.
Dynamic impact failure test flow of bolted rock ABSTRACT Bolt support mechanisms represent a key technique to support the surrounding rock in coal mines. In deep rock engineering applications, the bolt‐supported structure of the surrounding rock of a deep roadway under high bearing stress may fail under dynamic loads such as those of blasting ...
Peng‐qi Qiu, Wen‐wei Wang, Kai Wang, Jian‐guo Ning, Xiao‐qiang Zhang, Chun‐li Zhao, Qiang Xu, Hai‐tao Zong, Ting‐ting Cai   +8 more
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

Dynamic Load Mechanical Properties and Energy Characteristics of Rock–Coal Combination With Different Lithologies: A Laboratory Investigation

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
To address the substantial mining pressure from unstable rock formations, impact compression tests were performed on coal–rock combination specimens of varying strengths using a split Hopkinson pressure bar (SHPB). The dynamic mechanical properties, energy dissipation patterns, and failure modes of the specimens were systematically analyzed ...
Litong Dou, Benniu Wu, Long Wu, Kaifeng Huang, Qiang Fu, Yishan Li, Jie Yin, Xiuling Wang   +7 more
wiley   +1 more source

Sidewall rockburst of highly stressed D-shape hole tunnel triggered by impact load: An experimental investigation

Rock Mechanics Bulletin
This study aims to clarity the failure mechanism of sidewall rockburst of highly stressed D-shape tunnel triggered by impact load. Using the biaxial Hopkinson pressure bar (BHPB) system, we have developed experimental capabilities to study the sidewall ...
Wuxing Wu, Fengqiang Gong, Zong-Xian Zhang   +2 more
doaj   +1 more source

Characteristics of Microseismic Generated During Shear Failure of Granite With Structural Plane of Various Connectivities

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
The structural plane significantly changes the rock failure behavior. The connectivity of the structural plane generally varies for the rocks in different engineering practices or rock environments. In this manuscript, a series of direct shear tests on granite specimens are carried out using the true‐triaxial testing machine.
Xianzhe Liang, Zhicheng Hu, Xiufen Qin, Yaoqun Deng, Jianqing Jiang, Guoshao Su, Xu Hong   +6 more
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

Study on Deformation Characteristics of Surrounding Rock in Deep‐Buried Tunnels of Plateau Railroads

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
Regarding the deformation problem of surrounding rock in deep‐buried tunnels of high‐altitude railways, this article adopted a combination of numerical simulation and in situ monitoring analysis methods relying on a new plateau railroad tunnel. The deformation evolution law of tunnel surrounding rock under different burial depth conditions and its ...
Ziguang Zhang, Meng Zhang, Yahui Wang, Lin Wei, Lei Zhang, Biao Leng, Yong He, Xiaolong Sun   +7 more
wiley   +1 more source