Results 171 to 180 of about 3,062,426 (294)

Early tidal despinning history recorded in the tectonics of Oz Terra, Charon. [PDF]

Nat Commun
Chen H, Moon S, Yin A.
europepmc   +1 more source

Three‐dimensional hardening‐softening elastoplastic modeling of nondilatant rock‐like materials with nonorthogonal flow rule

Deep Underground Science and Engineering, EarlyView.
A novel three‐dimensional elastoplastic constitutive model is developed for nondilatant rock‐like materials under true‐triaxial stress conditions. A piecewise yield function captures the evolution of 3D yield surfaces during hardening‐softening processes, while a fractional‐order‐controlled nonorthogonal flow rule enables flexible regulation of ...
Jiacun Liu, Dongping Liu, Cifeng Cheng, Ying Xu, Kaiwen Xia   +4 more
wiley   +1 more source

Structural controls on gold deposits in the Egyptian Nubian Shield: insights from the Atalla-Sid Shear Belt, Central Eastern Desert, Egypt. [PDF]

Sci Rep
Hamimi Z, El Monsef MA, El Sundoly H, Abdelmaksoud AS, Alawy MK.   +4 more
europepmc   +1 more source

Steel segment–anchor bolt (cable) structure for TBM tunnels under extremely intense rockburst conditions: Design method and field application

Deep Underground Science and Engineering, EarlyView.
The graphical abstract presents a steel segment–anchorage support system for open TBM tunnels under extremely intense rockburst conditions. The steel segment resists dynamic impact, while the anchorage structure restrains segment deformation and transfers loads into the rock.
Zhijun Li, Pan Gao, Zhifan Xu, Zhilong Wang, Mingnian Wang   +4 more
wiley   +1 more source

The formation mechanism of the Liantang trough in Qiaojia County along the Jinsha River. [PDF]

Sci Rep
Song L, Shang Y, Wang Y, Chang Z.
europepmc   +1 more source

Selecting appropriate hydraulic fracturing methods for wells in deep and tight fractured sandstone reservoirs

Deep Underground Science and Engineering, EarlyView.
Deep and tight sandstone reservoirs require hydraulic fracturing treatment to enhance production, even in the presence of natural fractures. In the oil and gas industry, two commonly used methods are open‐hole multistage fracturing (MSF) and cased‐hole perforation fracturing. Both methods can fail or underperform in deep and tight reservoirs.
Kaiming Xia, Adel A. Qahtani
wiley   +1 more source

Gravity Anomaly Characteristics and Tectonic Implications of the Tangshan Seismic Zone. [PDF]

Sensors (Basel)
Zhang M, Wang J, Wu G, Tan H, Zhang L.
europepmc   +1 more source

Study on Fluid Pressure in Tubing, Dynamic Stress in Reservoir, and Fracture Propagation Morphology During Variable‐Rate Hydraulic Fracturing

Energy Science &Engineering, EarlyView.
Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley   +1 more source

Waned mantle upwelling contributes to a heavily deformed northern smooth plains on Mercury. [PDF]

Nat Commun
Xie J, Zhan Y, Gong S, Huang C, Zhang J.
europepmc   +1 more source

Fracture Development Mechanism of Water‐Isolating Soil Layers During Downward Mining of Shallow‐Buried Coal Seam Groups

Energy Science &Engineering, EarlyView.
This study systematically investigates the fracture development mechanisms of water‐isolating soil layers under the coupled effects of repeated mining and groundwater seepage during the downward mining of shallow‐buried coal seams. The findings provide a theoretical basis for evaluating stratum stability and preventing roof water inrush.
Tao Yang, Shuqi Zhang, Jie Zhang, Haifei Lin, Dong Liu, Hui Liu, Yiming Zhang, Jianping Sun   +7 more
wiley   +1 more source