Results 101 to 110 of about 143,227 (288)
Advances in Mechanical Engineering, 2019 Concentric-track cutting method of a conventional polycrystalline diamond compact bit makes the bit suffer from inadequate rock-penetrating capacity and severely hinders the improvement of rock-breaking efficiency.
Haitao Ren +5 more
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Numerical Investigation of Rock Breaking Mechanisms by High Pressure Water Jet
Procedia Engineering, 2015 AbstractMany factors and complexities are involved in breaking rock with a high-pressure water jet, which has made it difficult to explain the rock breaking internal mechanisms. This in turn has constrained the applications and development of water jet technology.
Chen, Hailong +3 more
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Advanced Science, EarlyView.Leveraging the multidimensional self‐catalytic merits of the alkali‐polyphenol synergistic self‐catalytic platform, this work delineates the intrinsic mechanism governing the regulation of hydrogel properties and puts forward an innovative design paradigm for frost‐tolerant electrode materials, providing critical scientific insights and technical ...
Mengting Zhou +10 more
wiley +1 more source
Rock breaking performance of disc cutter assisted by circumferential pre-slotting
Meitan xuebaoDisc cutter has a better hard rock breaking performance due to its undercutting mode. To further improve the mechanized excavation efficiency of hard rock roadway in underground coal mine, the rock wedged performance of disc cutter assisted by ...
Hongxiang JIANG +5 more
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Unsaturated Coordination Oxygen in Zn─V─O Vacancy Clusters Enables Superb Zinc Storage Capability
Advanced Science, EarlyView.Zn3(VO4)2 with Zn─V─O vacancy clusters was synthesized and innovatively applied as cathode material in aqueous Zn‐ion batteries. In‐situ XRD, HRTEM and ab initio molecular dynamics simulations unveil the double reaction mechanism of zinc ions. Adsorption of zinc ions on unsaturated coordination O and H+ on O in ‐VO4 contributes to the main capacity. It
Yulong Chi +8 more
wiley +1 more source
Shiyou jixieIn order to reveal the rock-breaking mechanism of full-size PDC bit under composite impact loads,from the perspective of temperature,a simulation model of fluid-solid-thermal coupling in rock breaking of PDC bit under composite impact loads was built ...
Cao Jifei +6 more
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Numerical simulations of dynamic rock damage under laser-induced shock waves
Meitian dizhi yu kantanObjectiveTraditional laser thermal rock breaking technologies suffer from high energy consumption and a limited damage depth. To overcome these challenges, this study proposed a novel mechanical rock breaking method based on high-pressure plasma shock ...
Yuelin XU, Enwei QIN, Wei LI, Ying WANG
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Shiyou jixie, 2021 The deep and complex formations in oil and gas exploration and development have the characteristics of high pore pressure, high temperature, high rock hardness, strong plasticity and poor drillability, which have brought many challenges to drilling ...
He Zhenguo +5 more
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Advanced Science, EarlyView.This review summarizes recent advances in four mainstream solution‐based techniques for synthesizing NiOx hole‐transport layers for high‐performance perovskite photovoltaic cells, and highlights the key challenges and future prospects for achieving high efficiency, long‐term stability, and low‐cost perovskite photovoltaic technologies toward ...
Zheng Wu +7 more
wiley +1 more source
Study of the Critical Speed of Ultra-High-Speed Diamond Drilling Technology in Marble
Applied SciencesIn order to effectively improve the drilling speed in deep hard rock and save drilling costs, this study explores the transformation mechanism and critical velocity range of ultra-high-speed diamond drilling technology on rock breaking effect, using ...
Yuxiao Li, Kai Zhang, Yue Wang
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