Results 31 to 40 of about 47,571 (265)

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +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

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

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Three-Dimensional Reconstruction of Road Structural Defects Using GPR Investigation and Back-Projection Algorithm

Sensors
Ground-Penetrating Radar (GPR) has demonstrated significant advantages in the non-destructive detection of road structural defects due to its speed, safety, and efficiency. This paper proposes a three-dimensional (3D) reconstruction method for GPR images,
Lutai Wang, Zhen Liu, Xingyu Gu, Danyu Wang   +3 more
doaj   +1 more source

Research on Single Tube Inverter Wireless Power Supply System for LED Lamp Inroadway

Journal of Harbin University of Science and Technology, 2020
In view of the inconvenient replacement of lamps and existing safety problems when using wired way to supply power to LED lamps in the roadway, this paper focuses on a wireless power supply device for LED lamps in the roadway.
WANG Songbai, WANG Chunfang, YUE Rui, LI Dan   +3 more
doaj   +1 more source

Vibration velocity and frequency characteristics of surrounding rock of adjacent tunnel under blasting excavation

Scientific Reports, 2022
The aim of this study is to improve the accuracy of response prediction and safety evaluation of blasting vibration of a deeply-buried tunnel group. For this purpose, the expression of frequency-domain and blasting vibration velocity spectra for the ...
Yi Luo, Hangli Gong, Dengxing Qu, Xueping Zhang, Yuhang Tao, Xinping Li   +5 more
doaj   +1 more source

Roadway and Traffic Attributes Influencing Occupancy Time of Minor-Road Right-Turning Vehicles at Urban Uncontrolled Intersections

U.Porto Journal of Engineering, 2023
The performance of uncontrolled intersection is usually measured based on delay of the least priority movement. Perhaps, most of the studies assumed single stage crossing and had to overlook additional factors for estimating occupancy time.
Ramesh Babu Kota, Arpan Mehar
doaj   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

Research on stope equivalent hole model and rotation law of principal stress

Meitan xuebao, 2023
Aiming at the problems of serious asymmetric damage phenomenon of roadway on the side of stope and unclear rotation law of principal stress around roadway, the relationship between the rotation of principal stress around roadway and the asymmetric damage
Hongtao LIU, Zihan CHEN, Xiaofei GUO, Zijun HAN, Qinyu LIU, Zhou HAN, Hongkai ZHANG   +6 more
doaj   +1 more source