Results 121 to 130 of about 7,526 (294)

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Train Control and Monitor System of 120 km/h Metro Trains

, 2015
The structure and function of the self-development TCMS (train control and monitor system) applied in Guangzhou metro line 3 metro trains were introduced.
LIU Jun, QIU Weiming, HE Hongcheng
core   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Investigation of Aerodynamic Pressure Characteristics Inside and Outside a Metro Train Traversing a Tunnel in High-Altitude Regions

Modelling
The numerical method was employed to analyze the transient pressure characteristics of a metro train passing through a tunnel in high-altitude regions.
Fei Wang, Haisheng Chen, Tianji Liu, Xingsen He, Chunjie Cheng, Lin Xu, Shengzhong Zhao   +6 more
doaj   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Sound Insulation Scheme of 120 km/h Metro Trains and Its Influence on Interior Noise

机车电传动, 2020
With the increase of the speed of metro trains, the problem of interior noise is becoming more and more serious. The sound insulation test and optimization of components were carried out for the car body structure of metro train, and the noise reduction ...
Renqing WANG, Fei XIAO, Jiankun XIE
doaj  

Research on Energy Saving Optimization of Metro Train Based on Immuneparticle Swarm Optimization Algorithm

, 2017
With full consideration of metro train dynamic characteristics, line conditions, speed limit in the interval, punctuality and so on, the multi-constraints energy consumption model based on utilization of regenerative braking energy was established ...
WANG Heliang
core   +1 more source

Dynamic response at the terminus of oblique intersecting joints subjected to stress waves

Deep Underground Science and Engineering, EarlyView.
This study derives the propagation equation for stress waves impinging upon nonlinear oblique intersecting joints. It analyzes the dynamic response at the terminus of nonlinear oblique intersecting joints subjected to stress waves. Abstract To investigate the dynamic response at the terminus of oblique intersecting joints subjected to stress waves, a ...
Gang Hu, Xiang Chen, Honglu Fei, Shijie Bao, Jian Guo   +4 more
wiley   +1 more source

Application of Platform Screen Door Gap Detection Device on Fully Automatic Operation Metro Lines

Chengshi guidao jiaotong yanjiu
Objective On the fully automatic operation metro lines, there exists a gap between the platform screen door and the train, leading to the risk of clamping people and objects.
LI Hongming
doaj   +1 more source