Results 21 to 30 of about 53,996 (266)

Damage evolution law and failure mechanism of rock impacted by high-pressure water jet under in-situ stress condition

Science Progress, 2023
To investigate the real physical mechanism of rock fragmentation subjected to water jet under in-situ stress condition, a numerical model based on the SPH algorithm was established using the rate-dependent constitutive model to simulate the rock-breaking
Fuwei Liu, Yansen Wang, Guoxuan Song
doaj   +1 more source

Determination Method of Excavation Damage Zone Based on Surrounding Rock Damage-Fracture Ratio in Underground Engineering

Frontiers in Earth Science, 2022
The depth of the excavation damage zone in the surrounding rock mass is an important parameter to determine the support design scheme, and is also of great reference significance to evaluate the stability of the surrounding rock.
Haosen Guo, Haosen Guo, Jiaqi Tong, Qiancheng Sun, Qiancheng Sun, Xu Yang, Wenjun Luo, Wenjun Luo, Yang Yu   +8 more
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Influence of Incremental Impact on the Damage of Coal-Rock under Unidirectional Constraint

Advances in Civil Engineering, 2019
Taking the briquette sample as research object, the influence of the incremental impulse (momentum) on the damage of coal-rock under different uniaxial axial pressure was studied by using the self-developed pendulum impact dynamic loading test device ...
Hongbao Zhao, Huan Zhang, Jinyu Li, Nansong Ju, Zhijie Wen   +4 more
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Influence of Parallel-Joint Position on Mechanical Behavior and Acoustic Emission Characteristics of Rock Pillar

Shock and Vibration, 2021
In this paper, the parallel-joint rock column model is established based on PFC software, and the effects of different joint positions on the mechanical properties, acoustic emission characteristics, and damage evolution characteristics of rock columns ...
Pei Zhang, Yanpeng He, Zhimeng Sun, Dong Yue   +3 more
doaj   +1 more source

Numerical Simulation on Damage and Failure Mechanism of Rock under Combined Multiple Strain Rates

Shock and Vibration, 2018
During underground hard-rock mining, the drilling and blasting method currently remains the most economical excavation method, and the rock may experience a multistrain-rate spectrum under quasi-static, dynamic, and rheological loading conditions and ...
Wancheng Zhu, Jiong Wei, Leilei Niu, Shuai Li, Shaohua Li   +4 more
doaj   +1 more source

Research progress on multi-scale damage of rock

Meitan kexue jishu
Rock damage and rupture is a multi-scale chain damage rupture process from microscopic to mesoscopic to macroscopic. It is essential to clarify the damage characteristics of rock at different scales and establish the quantitative relationships of multi ...
Fengzhen HE, Guichen LI, Jiaguang KAN, Xingliang XU, Xiaowei FENG, Yuantian SUN   +5 more
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Influence of dynamic disturbance on rock creep from time, space and energy aspects

Geomatics, Natural Hazards & Risk, 2022
In order to explore the influence of dynamic disturbance on creep behavior of rock, the creep damage evolution in rock under the dynamic disturbance are reproduced with creep damage model.
Zhen Yang, Wancheng Zhu, Kai Guan, Baoxu Yan, Hanwen Jia   +4 more
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Rocking the Boat: Damage to Eelgrass by Swinging Boat Moorings [PDF]

Frontiers in Plant Science, 2017
Seagrass meadows commonly reside in shallow sheltered embayments typical of the locations that provide an attractive option for mooring boats. Given the potential for boat moorings to result in disturbance to the seabed due to repeated physical impact, these moorings may present a significant threat to seagrass meadows.
Richard K. F. Unsworth, Richard K. F. Unsworth, Beth Williams, Benjamin L. Jones, Benjamin L. Jones, Leanne C. Cullen-Unsworth, Leanne C. Cullen-Unsworth   +6 more
openaire   +6 more sources

Evaluating Long-Term Strength and Time to Failure of Sandstone with Different Initial Damage

Advances in Civil Engineering, 2020
Long-term strength (LTS) of rock materials is important for the long-term stability analysis and the failure prediction of structures in rock engineering.
Rongbin Hou, Yanke Shi, Leige Xu, Jinwei Fu, Kai Zhang   +4 more
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An Improved Rock Damage Characterization Method Based on the Shortest Travel Time Optimization with Active Acoustic Testing

Mathematics
Real-time evaluation of the damage location and level of rock mass is essential for preventing underground engineering disasters. However, the heterogeneity of rock mass, which results from the presence of layered rock media, faults, and pores, makes it ...
Jing Zhou, Lang Liu, Yuan Zhao, Mengbo Zhu, Ruofan Wang, Dengdeng Zhuang   +5 more
doaj   +1 more source