Results 51 to 60 of about 8,212,561 (277)

Research on overburden structure of large mining height working face in shallow seam

Meitan xuebao
Based on the overburden conditions of Shendong and Northern Shaanxi coal bases, through the statistical analysis of the measured roof weighting characteristics and overburden caving height in large mining height working faces, combined with physical ...
Qingxiang HUANG, Jinlong GAO, Yehao WEI
doaj   +1 more source

Innovation progress and prospect on key technologies of intelligent coal mining

Gong-kuang zidonghua, 2018
Innovation and practice were summarized overall about intelligent fully mechanized coal mining in thin coal seam and thinner coal seam, intelligent fully mechanized coal mining of large mining height and super large mining height in thick coal seam, and ...
WANG Guofa, FAN Jingdao, XU Yajun, REN Huaiwei   +3 more
doaj   +1 more source

Pressure Control Technology at the Hard Thick Sandstone Roof in an Island Mining Face with a Large Mining Height

Tehnički vjesnik, 2020
Fracture of a critical stratum on a coal seam roof may cause strong strata pressure behaviours. In particular, a large-scale sudden fracture of the critical stratum, which is formed by hard thick sandstones on a mining face with a large mining height, can easily cause dynamic disasters of wells.
Baojie Fu*, Min Tu, Qingchong Zhao
openaire   +4 more sources

Cutting‐Caving Ratio Optimization of Fully Mechanized Caving Mining with Large Mining Height of Extremely Thick Coal Seam [PDF]

Advances in Civil Engineering, 2019
Serious rib spalling and low recovery rate problems caused by the poor top‐coal caving property (TCCP) were investigated in fully mechanized caving mining with large mining height (FMCMLMH) of extremely thick coal seam. For this aim, theoretical calculation, numerical simulation, and engineering application were applied to study the reasonable cutting ...
Kai Wang, Tong Zhao, Kaan Yetilmezsoy, Xiaoqiang Zhang   +3 more
openaire   +3 more sources

Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene

Advanced Materials, EarlyView.
In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar, James G. McHugh, Jonathan P. Salvage, Robert Vajtai, Venkataramana Gadhamshetty, Alan B. Dalton, Manoj Tripathi, Pulickel M. Ajayan, Vincent Meunier   +8 more
wiley   +1 more source

Development characteristics of water conduction fracture zone in deep coal seam mining in Ordos Basin

Meikuang Anquan, 2021
Most coal mines in Ordos Basin are mainly Jurassic coal seams. The mining conditions are characterized by large mining height and depth. The roof aquifer is numerous and poses a serious threat to mine safety.
QIN Wei, LI Wenping
doaj   +1 more source

Weka: A machine learning workbench for data mining [PDF]

, 2005
The Weka workbench is an organized collection of state-of-the-art machine learning algorithms and data preprocessing tools. The basic way of interacting with these methods is by invoking them from the command line.
Pfahringer, Bernhard, Hall, Mark A., Kirkby, Richard Brendon, Holmes, Geoffrey, Witten, Ian H., Frank, Eibe   +5 more
core   +1 more source

LEAD: Literature Enhanced Ab Initio Discovery of Nitride Dusting Layers for Enhanced Tunnel Magnetoresistance and Lower Resistance Magnetic Tunnel Junctions

Advanced Materials, EarlyView.
Magnetic tunnel junctions (MTJs) using MgO tunnel barriers face challenges of high resistance‐area product and low tunnel magnetoresistance (TMR). To discover alternative materials, Literature Enhanced Ab initio Discovery (LEAD) is developed. The LEAD‐predicted materials are theoretically evaluated, showing that MTJs with dusting of ScN or TiN on ...
Sabiq Islam, William S. Rogers, Chen‐Yu Hu, Ming‐Yuan Song, Xinyu Bao, Shehrin Sayed, Jean Anne C. Incorvia   +6 more
wiley   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Key technology and equipment for fully mechanized mining with extra-large shearing height of 10 m in extra-thick coal seam

Meitan xuebao
Fully mechanized mining technology with extra-large shearing height is the optimal technical approach to achieve high-yield, high-efficiency and high-recovery mining for 6−10 m ultra-thick coal seam in Chinese coal mines.
Hongpu KANG, Yajun LEI, Futang ZHAO, Gang XU, Zenglin LI, Mingzhong LI, Rui WANG, Zhizeng HUANG, Jiangbin LIU, Ying MA, Cundi HAN, Yanjun FENG, Zhen ZHANG, Jinhu ZHANG, Jianchao REN, Yejie SONG, Mingsheng ZENG, Lixing CHENG   +17 more
doaj   +1 more source