Results 31 to 40 of about 562 (174)

Research on the Nucleation Mechanism and Early Warning Method of Strain Rockburst in Deep-Buried Tunnel Based on Microseismic Monitoring

Lithosphere, 2022
In order to discuss the nucleation mechanism of strain rockburst, this paper takes the rockburst section of deep diversion tunnel of Jinping Hydropower Project of Yalong River as the research object.
Qun Yu, Chunyan Bao, Shengji Jin, Junxiang Wang   +3 more
doaj   +1 more source

Experimental study on the effect of water absorption level on rockburst occurrence of sandstone

Journal of Rock Mechanics and Geotechnical Engineering
To investigate the mechanism of rockburst prevention by spraying water onto the surrounding rocks, 15 experiments are performed considering different water absorption levels on a single face.
Dongqiao Liu, Jie Sun, Pengfei He, Manchao He, Binghao Cao, Yuanyuan Yang   +5 more
doaj   +1 more source

Research on Stress Characteristics of Rockburst in Over-Length Deep-Buried Tunnel

Buildings
As a unique geological hazard in a high-geo-stress environment, rockburst happens with strong suddenness, randomness, and destructiveness, but the mechanism of its occurrence in a deep-buried tunnel in a high-geo-stress environment needs further study ...
Chun Luo, Shishu Zhang, Bihua Tang, Jun Chen, Chonglin Yin, Huayun Li   +5 more
doaj   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +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

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

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

Investigation on the failure evolution characteristics of surrounding rock in deep cross‐fault roadway: Based on physical model test and numerical simulation

Deep Underground Science and Engineering, EarlyView.
This study reveals the failure evolution characteristics of deep cross‐fault roadway surrounding rock under excavation support and periodic weighting. Periodic weighting readily induces fault activation, with the spatial distribution of failed rock masses being controlled by the fault strike and dip.
Tiezhu Li, Suping Peng, Jing Zheng, Zhanhua Yang, Qijun 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