Results 101 to 110 of about 143,249 (287)

PRINCIPLES OF ROCK PRESSURE ENERGY USAGE DURING UNDERGROUND MINING OF DEPOSITS [PDF]

, 2017
Purpose. To substantiate principles of rock pressure usage during underground mining of deposits. Methodology. Zonal structuring indices of massif around mine workings were established with help of industrial, laboratory and theoretical research of ...
Khomenko, O. Ye, Malanchuk, Ye. Z, Malanchuk, Z. R, Sudakov, А. К   +3 more
core  

Dynamic Etching‐Induced Cl‐Terminated Ti3C2Clx/Ti3ZnC2 Heterostructure for Ammonia Electrosynthesis and Zinc‐Nitrogen Batteries

Advanced Science, EarlyView.
A stable Ti3C2Clx/Ti3ZnC2 heterostructure, fabricated by dynamic etching, exhibits outstanding electrocatalytic NRR activity (NH3 yield: 20.1 µg h−1 mg−1, FE: 38.1%) in alkaline media. The corresponding Zn‐N2 battery achieves a peak power density of 36.5 µW cm−2 and an NH3 yield of 13.1 µg h−1 mg−1, providing an advanced strategy for NH3 and ...
Yu Wang, Ying Sun, Liqun Ye, Jichi Liu, Hui Li, Yang Fu, Fengzhan Sun, Jieshan Qiu, Chang Yu, Tianyi Ma   +9 more
wiley   +1 more source

The chemical bond as an emergent phenomenon

, 2017
We first argue that the covalent bond and the various closed-shell interactions can be thought of as symmetry broken versions of one and the same interaction, viz., the multi-center bond.
Golden, Jon C., Ho, Vinh, Lubchenko, Vassiliy   +2 more
core   +1 more source

Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway

Advanced Science, EarlyView.
Magnetoelectric nanoparticles (MENPs) enable fully wireless, minutely invasive neuromodulation, and potentially neural recording, by converting magnetic into electric and, conversely, electric into magnetic fields, respectively, at high spatiotemporal resolution.
Elric Zhang, Max Shotbolt, Mostafa Abdel‐Mottaleb, Shawnus Chen, Victoria Andre, Jieyuan Tian, Jonathan Shulgach, Max Murphy, Brian Noga, Ping Liang, Darcy Griffin, Douglas Weber, Marta Pardo, Salvador Pane, Sakhrat Khizroev   +14 more
wiley   +1 more source

Research on working principle and cross-track cutting characteristic of the axis-tilted rock-breaking tool

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, Yingxin Yang, Chunxiao Zhou, Shiwei Niu, Chunliang Zhang, Kuilin Huang   +5 more
doaj   +1 more source

Scalable, Low‐Cost, Freeze‐Resistant Hydrogels by Alkali‐Polyphenol‐Triggered Polymerization for Low‐Temperature Self‐Powered Triboelectric Sensor

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, Yaru Bao, Chunpeng Li, Caicai Li, Gaobo Lou, Shaochao Sun, Zhezhe Zhou, Gaojie Jiao, Xiaochun Zhang, Pingan Song, Dan Sun   +10 more
wiley   +1 more source

Rock breaking performance of disc cutter assisted by circumferential pre-slotting

Meitan xuebao
Disc 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, Xiaodi ZHANG, Kuidong GAO, Ouguo WANG, Shen SONG, Hongsheng LI   +5 more
doaj   +1 more source

Study on the Mechanism of Stick-Slip Vibration Based on Single-Cutter Rock Breaking Finite Element Simulation

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, Shi Libao, Li Lingxi, Kong Lulin, Zhang Xiaoning, Liu Xinyun   +5 more
doaj  

Numerical simulation study of rock breaking mechanism by high voltage electric pulse

矿业科学学报, 2023
High-voltage electric pulse(HVEP)drilling has become a new and efficient rock breaking method, which is also the research focus in the field of drilling speed increase. To probe into rock breaking mechanism of high voltage electric pulse, this study establishes a two-dimensional numerical model of multi-physical field coupling electric breakdown of ...
Liu Weiji, Zhang Youjian, Zhu Xiaohua, Feng Wenrong   +3 more
openaire   +1 more source

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, Fulong Li, Yangxian Wang, Longwei Li, Haolin Li, Xiaodong Shi, Xinlong Tian, Yihui Zou, Dongjiang Yang   +8 more
wiley   +1 more source