Results 11 to 20 of about 1,794 (218)

Research on the Risk Assessment of Water Inrush From the Roof of the Fully Mechanized Mining Face in Huanglong Jurassic Coalfield

Geofluids
The frequent occurrence of water inrush disasters from the fissured aquifer of the Lower Cretaceous Luohe Formation sandstone in the Jurassic coalfield of Huanglong, due to mining-induced disturbances in the roof, poses a significant threat to the safe ...
Yanbo Hu, Wenbo Feng, Gang Zheng, Xinmin Chen   +3 more
doaj   +3 more sources

Geochemical Characteristics of Rare, Dispersed, and Rare Earth Elements in the Middle Jurassic Yan'an Formation of the Ningdong Coalfield and Their Indication for a Sedimentary Environment

Yankuang ceshi, 2022
BACKGROUND Rare, dispersed, and rare earth elements are important strategic resources because of their special performance and function. At the same time, because of its unique geochemical properties, it is of great significance in the study of ...
HE Wei, WU Liang, WEI Xiangcheng, TAO Rui, SONG Yang   +4 more
doaj   +2 more sources

Study on characterization of sandstone pore structure and seepage mechanism based on NMR and CT technology. [PDF]

PLoS ONE
Coal-seam roof water disasters severely constrain safe and high-efficiency coal production. Integrating NMR, X-CT, Avizo, Netfabb, and Comsol, we systematically characterized pore architecture and flow behavior for the coarse, medium, and fine sandstones
Songxin Zhao, Kaide Liu, Chaowei Sun, Wenping Yue, Qiyu Wang, Yu Xia, Xinping Wang   +6 more
doaj   +2 more sources

Height Prediction of Water-Conducting Fracture Zone in Jurassic Coalfield of Ordos Basin Based on Improved Radial Movement Optimization Algorithm Back-Propagation Neural Network

Mathematics
The development height of the water-conducting fracture zone (WCFZ) is crucial for the safe production of coal mines. The back-propagation neural network (BP-NN) can be utilized to forecast the WCFZ height, aiding coal mines in water hazard prevention ...
Zhiyong Gao, Liangxing Jin, Pingting Liu, Junjie Wei   +3 more
doaj   +2 more sources

Risk assessment of water loss in deep coal seam mining in Jurassic coalfield in Shaanxi and Inner Mongolia contiguous area

Meikuang Anquan, 2023
This paper takes Taigemiao Mining Area in the middle and upper reaches of the Yellow River Basin as the research object, analyzes the relationship between the spatial structure of water-bearing（ｉｓｏｌａｔｅｄ） layer and the development height of water flowing ...
SHANG Hongbo, ZHAO Chunhu, YU Bo, XUE Jiankun, LIU Ji   +4 more
doaj   +2 more sources

Organic geochemistry of Middle Jurassic coal seam in the Sandaoling Coalfield, Northwest China: Insights into the depositional environment

Energy Exploration & Exploitation
The study of coal seams provides valuable insights into the environmental changes that have occurred throughout Earth's geological history. Coal formation was notably widespread during the Jurassic period in mid-latitude East Asia.
Yan Meng, Ning Zhang, Dan Tian, Weixu Li, Vivek Mishra, Yun Xu   +5 more
doaj   +2 more sources

Geological Controls on Mineralogical Characteristic Differences of Coals from the Main Coal Fields in Shaanxi, North China

Energies, 2021
Shaanxi is among the provinces with abundant coal resources in North China. These enormous coal resources (approx. 4143 Gt) are widely distributed in the Ordos Basin and its marginal fold belts.
Wei Yuan, Jing Li, Xinguo Zhuang, Guanghua Yang, Lei Pan   +4 more
doaj   +1 more source

Maceral, Mineralogical and Geochemical Characteristics of the Jurassic Coals in Ningdong Coalfield, Ordos Basin [PDF]

Energy Exploration & Exploitation, 2014
17 samples, including 16 coal-seam samples and one parting, were collected from 4 mines in Ningdong Coalfield, west Ordos Basin, China. Maceral, mineralogy and geochemistry of them were studied by using of optical microscope, LTA-XRD (low temperature ashing-X-ray diffraction), XRF (X-ray fluorescence), and ICP-MS (Inductively coupled plasma mass ...
Cunliang Zhao, Bin Zhao, Zhixiang Shi, Lin Xiao, Danhua Wang, Alexander I. Khanchuk, Vladimir V. Ivanov, Maxim G. Blokhin   +7 more
openaire   +1 more source

REE characteristics of the coal in the Erlian Basin, Inner Mongolia, China, and its economic value

China Geology, 2021
The rare earth elements (REE) content of the coal in the Erlian Basin was determined by inductively coupled plasma mass spectrometry (ICP-MS), and it turns out that the REE content from different geological age shows a significant difference: The REE ...
Shao-qing Huang, Shu-zheng Ning, Jian-qiang Zhang, Li Zhang, Kang Liu   +4 more
doaj   +1 more source

Construct a Paleo-Limnological Environment Based on Coal Petrography; Case Study, Two Selected Coal Seams, North Crowsnest Open-Pit Mine, Canada

Iraqi Geological Journal, 2021
The Crowsnest coalfield is a separated structural coalfield at the East Kootenay basin within southeast British Columbia. Selected Jurassic-Cretaceous two coals seam S-10 and S-C of the Mist-Mountain formation were investigated from the points of coal ...
Nader A.A. Edress
doaj   +1 more source