Results 191 to 200 of about 1,645,202 (341)

Using a meshless method to investigate the effects of confining pressure on the hydraulic fracturing processes of hydraulic tunnels. [PDF]

Sci Rep
Zhang H, Shi Y, Mu J, Hao R, Qi D, Li W, Zhang B, Yu S.   +7 more
europepmc   +1 more source

Laboratory Experimentation on Simultaneous Propagation of Multiple Hydraulic Fractures

, 2019
Stress shadowing, a well-known effect that occurs in multi stage hydraulic fracture operations when the hydraulic fractures are placed close to each other, is an important challenge to obtain the highest estimated ultimate recovery (EUR) from a ...
Gunaydin, Delal
core  

Concept, Tests, and Optimum Design of Novel Negative Stiffness Friction Dampers for Seismic Protection of Long‐Span Bridges

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Viscous dampers (VDs) are widely used to mitigate the excessive responses of long‐span bridges. However, VDs face some intricate challenges in engineering practices, including high damping coefficient requirement, potential base shear amplification and tremendous damping force under high velocity. To address these issues, this study develops a
Ruisheng Ma, Shaodong Jiang, Kun Xu, Qiang Han, Xiuli Du, Kaiming Bi   +5 more
wiley   +1 more source

Evaluation of hydraulic fracturing using machine learning. [PDF]

Sci Rep
Akbari A, Karami A, Kazemzadeh Y, Ranjbar A.   +3 more
europepmc   +1 more source

Frequency Induced Hydraulic Fracturing

, 2018
Gas, oil and ground water well stimulation, by dynamic hydraulic rock fracturing, is considered. Well borehole lateral drilling procedures and porous rock fracturing, by the application of hydraulic pressure, chemical and sand proppants, is addressed ...
Abdul-Ameer, Alaa
core  

Unsteady Flow Behavior and Radial Force Analysis of a Side Channel Pump Under Different Blade Tip Cutting Angles Using Computational Fluid Dynamics

Energy Science &Engineering, EarlyView.
The Radial Force (RF) distribution under different cutting angles is presented in Figure 1. Generally, the distribution of RF displays divergence across different flow conditions. The pattern of force distribution reveals a total of 24 peaks, which corresponds to the number of blades of the impeller of the SCP.
Kofi Asamoah Adu‐Poku, Desmond Appiah, Fan Zhang, Chen Ke   +3 more
wiley   +1 more source

Energy evolution mechanism of hard roof of working face adjacent to goaf after hydraulic fracturing and application. [PDF]

Sci Rep
Liu X, Liu H, Dong J, Sun W.
europepmc   +1 more source

Stability Evaluation and Parametric Optimization of Coal‐Concrete Composite Bearing Systems Under Mine‐Water‐Induced Deterioration: Experiments and FEINN Analysis

Energy Science &Engineering, EarlyView.
Mine‐water immersion tests reveal pronounced coal weakening (vs. minor concrete degradation), identifying coal pillars as the stability‐limiting component in composite dams. A coupled FEINN framework quantifies extreme‐pressure stability and ranks multi‐parameter designs via a normalized multi‐indicator scheme, enabling optimized dam configuration for ...
He Wen, Hongchuan Dai, Guixin Zhang, Pengzhe Li, Tong Yang, Cang Gong, Renbo Gao   +6 more
wiley   +1 more source

The bound growth of induced earthquakes could de-risk hydraulic fracturing. [PDF]

Commun Earth Environ
Schultz R, Lanza F, Dyer B, Karvounis D, Fiori R, Shi P, Ritz V, Villiger L, Meier P, Wiemer S.   +9 more
europepmc   +1 more source

The Seepage Characteristics of Single Rough Joint of Granite Based on NMR Technology: A Modified Cubic Law

Energy Science &Engineering, EarlyView.
The low‐field nuclear magnetic resonance (NMR) measurements are applied to investigate the seepage characteristics of the single rough joint. The purpose of this paper is to investigate the seepage characteristics of granite specimens with single‐joint channel under the different roughness, confining pressures and seepage pressures.
Hao Cheng, Xiujie Zhong
wiley   +1 more source