Results 31 to 40 of about 13,578 (224)

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +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

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 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

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

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

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

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

Trajectory Planning and Tracking With Multiobjective Optimization for Connected and Automated Vehicles at Expressway On-Ramps

Journal of Advanced Transportation
On-ramp merging is a common expressway maneuver for connected and automated vehicles (CAVs), where trajectory planning and tracking control are central to avoiding collisions. However, existing studies rarely optimize the selection of merge start and end
Zhibo Gao, Lan Yao, Jin Li, Yanduo Yin, Jian Xiang, Kejun Long   +5 more
doaj   +1 more source

Eco-Friendly Bitumen Composites with Polymer and Rubber Waste for Sustainable Construction

Buildings
The modern road industry requires a more effective solution according to efficiency and minimizing environmental burden. This article discusses the use of recycled materials to modify bitumen binders within the concept of the circular economy.
Gaini Zhumagalievna Seitenova, Rizagul Muslimovna Dyussova, Daulet Abaykhanovich Aspanbetov, Assel Yermekovna Jexembayeva, Kinga Korniejenko, Lyazat Aruova, Darkhan Kuandykovich Sakanov   +6 more
doaj   +1 more source