Results 21 to 30 of about 16,550,397 (137)

Open pit uranium mines, including Zee pits

, 2022
Date scanned: 2002-7-18.Figure 4 Black and white print of a color infrared photograph showing open pit uranium mines. NASA Photograph 58-0007, May 1974.Related image: U1637.Donor: United States Bureau of Mines.Open pit uranium mines, including the sites ...

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Discussion on the water-preserved coal mining by dewatering-reflooding water curtain in open-pit coal mines

, 2021
To suppress the attenuation of groundwater resources caused by drainage and control the influence range of coal mining on groundwater resources, the coal mining technology with water curtain was adopted.
Zhuo, YANG, Ying, LI, Tong, WU
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Research on Dominant Factors and Control Technologies for Instability in Cross-Mining Roadway

Eng
To investigate the dominant factors and instability mechanism of surrounding rock deformation in cross-mining roadways, a systematic study was conducted using theoretical analysis, numerical simulation, and response surface methodology to examine the ...
Hao Wang, Miao Chen, Jiangwei Liu, Peidong Li, Wenfei Wang, Xianghan Xu, Hui Zhou   +6 more
doaj   +1 more source

Ultrathin 2D In2O3 Nanosheets Confining Cu Single Atoms Synergized With Oxygen Vacancies for High Selectivity of Photocatalytic Reduction of CO2 to CO

Advanced Science, EarlyView.
In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure based on oxygen vacancies (OV)‐rich defects and low crystallinity to anchor Cu single atoms (Cu SAs) and synthesized Cu/In2O3‐Ns photocatalysts. ABSTRACT In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure ...
Yueying Yang, Xuan Xiang, Jiali Ren, Ying Bian, Xinyu Wang, Xiaoyang Lu, Yanjun Xue, Porun Liu, Cheng‐Hao Chuang, Xiaoli Zhang, Jian Tian   +10 more
wiley   +1 more source

Exploring the Effectiveness of Fusing Synchronous/Asynchronous Airborne Hyperspectral and LiDAR Data for Plant Species Classification in Semi-Arid Mining Areas

Remote Sensing
Plant species classification in semi-arid mining areas is of great significance in assessing the environmental impacts and ecological restoration effects of coal mining.
Yu Tian, Zehao Feng, Lixiao Tu, Chuning Ji, Jiazheng Han, Yibo Zhao, You Zhou   +6 more
doaj   +1 more source

Description of large, well‐preserved Enchodus specimens from the Bearpaw Formation of Alberta, Canada

The Anatomical Record, EarlyView.
Abstract Fishes of the genus Enchodus were abundant and cosmopolitan in the Late Cretaceous, but are primarily known from isolated remains in Canada. Four well‐preserved fish skulls were recovered in recent years from ammolite mines sampling the Bearpaw Formation of Southern Alberta, and are here referred to Enchodus petrosus Cope, 1874.
Luke E. Nelson, Alison M. Murray, Donald B. Brinkman   +2 more
wiley   +1 more source

Deciphering the Palimpsest: Chronological Uncertainty and the Interpretation of Mining Landscapes at Písečný vrch (Czech Republic)

Archaeological Prospection, EarlyView.
ABSTRACT We investigated the Písečný vrch (Czech Republic), a site exploited for quartz mining in both prehistoric times and the 20th century. Due to their morphological similarity across all mining periods, the differentiation between pits with archaeological potential and recent ones is challenging.
Jan Fišer, Petr Krištuf, Jan Kropáček, Vojtěch Barták, Lenka Starková, Vítězslav Moudrý   +5 more
wiley   +1 more source

Study on direction of coal utilization in open-pit mine based on VIKOR method

, 2021
During the production of open pit coal mine, coal seams with different natural index values of coal quality are often mined at the same time. In view of this phenomenon, the market competitiveness of enterprises can be improved through the balance of ...
YANG Fuqing, ZHOU Wei, LU Xiang, TIAN Ya, KONG Ruiqian, CAI Qingxiang
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Field application and microscopic reinforcement mechanism of electrochemical technology for weak interlayer soft rock slopes in open-pit coal mines

Frontiers in Earth Science
IntroductionSoft rock slopes containing weak mudstone interlayers in open-pit coal mines easily experience subsidence-sliding failure. The weak interlayers feature low permeability and inferior mechanical properties, which severely threaten open-pit ...
Meng Han, Meng Han, Meng Han, Jindian Li, Jindian Li, Haowen Shen, Haowen Shen, Ningwei Wang, Boshi Gong, Boshi Gong, Wenbo Yang, Wenbo Yang   +11 more
doaj   +1 more source

“Seven in one” effect inspection method system of water cut-off curtain in open-pit coal mine

Meikuang Anquan, 2023
In order to realize green, safe and efficient mining in open-pit coal mines, water cut-off curtain as a new technology of energy saving, carbon reduction and water conservation, has been continuously applied to open-pit coal mines. The cut-off curtain of
ZHANG Yan
doaj   +1 more source