Results 11 to 20 of about 267 (157)

Paleovegetation Community and Paleoclimate Succession in Middle Jurassic Coal Seams in Eastern Coalfields in Dzungaria Basin, China. [PDF]

Plants (Basel)
The Dzungaria Basin is located north of Xinjiang and is one of the largest inland basins in China. The eastern coalfields in the Dzungaria Basin contain a large amount of coal resources, and the thickness of the coal seams is significant. Therefore, the aim of this study was to classify the paleovegetation types and develop paleoclimate succession ...
Wang X, Feng S, Wang W, Zhang Q, Tian J, Han C, Wang M.   +6 more
europepmc   +4 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   +2 more
exaly   +3 more sources

The characteristic and evolution of coal-forming swamp in Hanshuiquan district, Santanghu Coalfield, Xinjiang, NW China, during the Middle Jurassic: evidence from coal petrography, coal facies and sporopollen

International Journal of Coal Science and Technology, 2019
Santanghu Coalfield is the largest integrated coalfield exploration area in China. The major coal seams developing in Xishanyao Formation (Middle Jurassic) are the high-quality steam coals characterized by large thickness, favorable horizontal continuity
Jijun Tian, Feng Shuo
exaly   +3 more sources

Geochemical and Mineralogical Characteristics of the Middle Jurassic Coals from the Tongjialiang Mine in the Northern Datong Coalfield, Shanxi Province, China [PDF]

Minerals (Basel, Switzerland), 2019
There is limited information available on the minerals and elements present in the Jurassic coals from Datong Coalfield. This paper investigates the geochemical and mineralogical characteristics of the Middle Jurassic coals from the Tongjialiang Mine using X-ray powder diffraction (XRD), X-ray fluorescence spectrometry (XRF), inductively coupled plasma
Songhang Zhang, Shuheng Tang
exaly   +2 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

Distribution, Occurrence and Enrichment Causes of Sodium in Middle Jurassic Coal from Zhundong Coalfield, Xinjiang

Minerals (Basel, Switzerland)
The coal found in the Zhundong Coalfield is highly suitable for power generation and gasification. However, the high sodium content within the coal leads to severe boiler slagging and contamination. Additionally, sodium disperses into the gaseous phase to form haze, adversely affecting the local atmospheric environment.
Wenfeng Wang, Qingfeng Lu
exaly   +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

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

Determining the Height of Water‐Flowing Fractured Zone in Bedrock‐Soil Layer in a Jurassic Coalfield in Northern Shaanxi, China [PDF]

Advances in Civil Engineering, 2021
The height of the water‐flowing fractured zone is the most important technical parameter for water prevention and control in a coal mine. Due to the numerous factors affecting the water‐flowing fractured zone, it is difficult to accurately identify the zone.
Jie Feng, Sujian Wang, Enke Hou, Xiang Ding, Huijun Duan   +4 more
openaire   +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