Results 31 to 40 of about 504 (182)

Effect of the Initial Support of the Tunnel on the Characteristics of Rockburst: Case Study and Mechanism Analysis

Advances in Civil Engineering, 2022
Rockburst is still a stubborn disease in the field of engineering geology. The present research pays more attention to the influence of geological conditions on rockburst and less to the influence of type and stiffness of engineering support on rockburst.
Chunchi Ma, Junqi Fan, Xiang Ji, Xiaoyan Shi, Jun Zeng   +4 more
doaj   +1 more source

A review of rockburst: Experiments, theories, and simulations

Journal of Rock Mechanics and Geotechnical Engineering, 2023
Rockburst is becoming a huge challenge for the utilization of deep underground space. Extensive efforts have been devoted to investigating the rockburst behavior and mechanism experimentally, theoretically, and numerically.
Manchao He, Tai Cheng, Yafei Qiao, Hongru Li   +3 more
doaj   +1 more source

Experimental and constitutive modeling investigations on marble in Jinping Underground Laboratory

Deep Underground Science and Engineering, EarlyView.
The objective of this study is to reveal the underlying mechanisms behind the brittle‐ductile transition of the marble through a combination of experimental research and constitutive modeling. A series of triaxial compression and triaxial cyclic loading tests are conducted.
Susheng Wang, Qiang Zhang, Hao Luo, Zhinan Lin   +3 more
wiley   +1 more source

Energy evolution mechanism during rockburst development in structures of surrounding rocks of deep rockburst-prone roadways in coal mines

Frontiers in Energy Research, 2023
Influenced by the deep high-stress environment, geological structures, and mining disturbance in coal mines, the frequency of rockburst disasters in roadways is increasing. This research analyzed energy evolution characteristics during rockburst development in the elastic bearing zone and energy conversion in the plastic failure zone.
Zhongtang Xuan, Zhongtang Xuan, Zhongtang Xuan, Zhiheng Cheng, Chunyuan Li, Chaojun Fan, Hongyan Qin, Wenchen Li, Kai Guo, Haoyi Chen, Yifei Xie, Likai Yang   +11 more
openaire   +2 more sources

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

Deep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan, Chenxi Yin, Guangdong Yang, Shengyong Ding, Bin Tian   +4 more
wiley   +1 more source

Experimental study on the effect of unloading rate on gneiss rockburst

Journal of Rock Mechanics and Geotechnical Engineering
Rockburst are often encountered in tunnel construction due to the complex geological conditions. To study the influence of unloading rate on rockburst, gneiss rockburst experiments were conducted under three groups of unloading rates.
Dongqiao Liu, Jie Sun, Ran Li, Manchao He, Binghao Cao, Chongyuan Zhang, Wen Meng   +6 more
doaj   +1 more source

The Mechanical Criterion of Activation and Instability of Normal Fault Induced by the Movement of Key Stratum and Its Disaster-Causing Mechanism of Rockburst in the Hanging Wall Mining

Advances in Civil Engineering, 2021
Coal mine rockburst is closely related to the complex geological structure. Understanding the criterion of the fault activation instability and the disaster-causing mechanism of rockburst under the influence of mining is the theoretical premise and ...
Lyu Pengfei, Lu Jiabin, Wang Eryu, Chen Xuehua   +3 more
doaj   +1 more source

A study of the characteristics and influence mechanism of time delayed rockburst in a TBM tunnel under the blasting disturbance

Shuiwen dizhi gongcheng dizhi, 2023
The occurrence of time delayed rockburst usually has strong randomness and will pose a great threat to construction safety. Excavation disturbance and blasting disturbance will have impact of varying degrees on the potential time delayed rockburst area ...
Yongwei QUAN, Jun WANG, Yongrun XIONG, Zhibin YAO, Yu ZHANG, Lei HU   +5 more
doaj   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Experimental Research on Brittleness and Rockburst Proneness of Three Kinds of Hard Rocks under Uniaxial Compression

Advances in Civil Engineering, 2021
Rockburst is a highly destructive geological disaster caused by excavation and unloading of hard and brittle rock mass under high geostress environment. Quantitative evaluation of rock brittleness and rockburst proneness is one of the important tasks in ...
Rongchao Xu, Yiding Jin, Yumin Zhang
doaj   +1 more source