Results 161 to 170 of about 781 (192)

Mechanism and catastrophe theory analysis of circular tunnel rockburst

Applied Mathematics and Mechanics, 2006
Mechanism of circular tunnel rockburst is that, when the carrying capacity of the centralized zone of plastic deformation in limiting state reduces, the comparatively intact part in rock mass unloads by way of elasticity; rockburst occurs immediately when the elastic energy released by the comparatively intact part exceeds the energy dissipated by ...
Yue Pan, Yong Zhang, Guang-ming Yu
openaire   +1 more source

A Mechanism for High Wall-rock Velocities in Rockbursts

pure and applied geophysics, 1997
Considerable evidence has been reported for wall-rock velocities during rockbursts in deep gold mines that are substantially greater than ground velocities associated with the primary seismic events. Whereas varied evidence suggests that slip across a fault at the source of an event generates nearby particle velocities of, at most, several m/s ...
openaire   +1 more source

Numerical Analysis of Induced Mechanism of Rockbursts in Tunnels

58th U.S. Rock Mechanics/Geomechanics Symposium
ABSTRACT: Rockburst is a sudden and violent failure characterized by the breaking up and expulsion of rock from its surroundings. Tunnel rockbursts pose a significant threat to the safety of excavation operations, leading to property damage and tunneler casualties.
J. Deng, Y. Gong, S. Li
openaire   +1 more source

The Rockburst Experiment Usage of Similar Material and the Mechanism of the Energy Releasing

Advanced Materials Research, 2011
As one of the geological disasters, rockburst is often generated in underground engineering under excavation unloading conditions in high geostress areas. Taking advantage of the simulation test especially for the rock mass under high hydrostatic stress, the dynamic failure rockburst style resulted from instantaneous unloading in one direction was ...
Jie Li, Yue Hong Qian, Da Peng Li
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Re-analysis of the rockburst mechanism and discussion on the gradation of the rockburst intensity

2022
Hou Faling, Liu Xiaoming
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A consideration of the mechanics of rockbursts occurring in a tunnel

2022
Atsuo Hirata, Tom Hirano, Yoshiharu Tanaka, Noriyuki Arai, Hideo Matsuda, Yoshitomo Kameoka   +5 more
openaire   +1 more source

The induced mechanism of pillar rockbursts in deep hard rock mines

Proceedings of the International Conference on Deep and High Stress Mining, 2014
Rockbursts remain one of the most serious and least understood problems in deep hard rock mines. This study is motivated by the pervasiveness of rockbursts all around the world. It is found that rockbursts are often induced by dynamic fluctuations, which are generated by mining excavations or other sources of vibrations, such as blasting in adjacent ...
openaire   +1 more source

Mechanism and monitoring and early warning technology for rockburst in coal mines

International Journal of Minerals, Metallurgy and Materials, 2021
Chao Zhou, Zhen-Lei Li, Majid Khan
exaly  

Rockburst mechanism in coal rock with structural surface and the microseismic (MS) and electromagnetic radiation (EMR) response

Engineering Failure Analysis, 2021
Xuelong Li, Shaojie Chen, Enyuan Wang
exaly  

Rockburst in underground excavations: A review of mechanism, classification, and prediction methods

Underground Space (China), 2022
Ali Saeidi
exaly