Results 11 to 20 of about 344 (181)

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   +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 ...
Pingting Liu, Liangxing Jin
exaly   +4 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   +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
Shuheng Tang, Songhang Zhang
exaly   +3 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, Piaopiao Duan, Qingfeng Lu   +2 more
exaly   +3 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   +3 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   +2 more sources

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

Study on Hydraulic Connection　of Multiple Aquifers Based on Dewatering Test of Sandstone Aquifer from Floor

Meikuang Anquan, 2020
In order to find out the hydraulic connection between Baotashan sandstone aquifer from the floor of coal seam and other aquifers in the Jurassic coalfield, the underground dewatering test is adopted. The Baotashan sandstone aquifer is drained with large
ZHAO Baofeng, LYU Yuguang
doaj   +2 more sources

Geological technological innovations and contributions in the exploration and development of the Shenfu coalfield [PDF]

Meitian dizhi yu kantan
BackgroundThe discovery and exploration of the Shenfu coalfield (i.e., a Jurassic coalfield in northern Shaanxi Province) represent the most significant achievement in China’s coal industry during the 6th Five-Year Plan of the country, marking the onset ...
Limin FAN
doaj   +2 more sources