Results 61 to 70 of about 267 (157)

Geochemical characteristics of Jurassic high-sodium coal in Tatuo Coal Mine, Qinghai Province, China

Energy Exploration & Exploitation, 2023
Sodium in the coals of West China has received persistent attention due to its high contents and severe pollutions’ problems during coal utilization.
Jun Wang, Zewei Wang, Zhi Yu, Panchal Balaji, Jie Shi, Yanli Yang   +5 more
doaj   +1 more source

Simulation of the Liquid–Solid Coupling in the Distribution Law of Water‐Conducted Fractures in Weakly Cemented Overburden Strata as Exemplified by Daliuta Coal Mine in Western China

Geofluids, Volume 2025, Issue 1, 2025.
Based on the engineering background of the Daliuta mining area, the distribution of fractures and movement of water within weakly cemented overlying strata were studied with a physical simulation of liquid–solid coupling and a COMSOL numerical simulation test.
Yangyang Li, Boming Zhang, Shichuan Zhang, Xuexian Han, Weihong Yang, Haibin Wang, Chuanwei Jia, Pramita Mishra   +7 more
wiley   +1 more source

Subsidence prediction of overburden strata and ground surface in shallow coal seam mining

Scientific Reports, 2021
Shallow coal seam with thick soil layer is widely reserved in the Jurassic Coalfield, Western China, mining-induced subsidence represents complex characteristics.
Jian Cao, Qingxiang Huang, Lingfei Guo
doaj   +1 more source

Revision of Sagenopteris (Caytoniales): a major lineage of the Mesozoic seed plants

Papers in Palaeontology, Volume 10, Issue 6, November/December 2024.
Abstract Sagenopteris is the most common fossil organ attributed to Caytoniales and is represented by compound leaves having several (usually four) lanceolate leaflets in pseudo‐palmate arrangement. Since Presl's description of Sagenopteris in 1838, at least 82 species have been identified worldwide.
Yuanyuan Xu, Maria Barbacka, Paweł Kapusta, Agata Jarzynka, Yongdong Wang, Stephen McLoughlin   +5 more
wiley   +1 more source

Provenance and the U–Pb age constraints on the tuff beds of the Late Jurassic–Early Cretaceous Bazhenovo Formation, West Siberian Basin

The Depositional Record, Volume 10, Issue 2, Page 312-334, April 2024.
Report on the geochemistry and geochronology of the tuff beds from the Bazhenovo black shales, West Siberian Basin. Geochemical discrimination indicates an affinity with volcanic arc basalts. New constraints on the J–K boundary in the Boreal Realm using high‐precision U–Pb data.
Timur Bulatov, Yakov Yermakov, Anna Kulikova, Bulat Gareev, Mikhail Spasennykh   +4 more
wiley   +1 more source

Mechanism and control of strong rock pressure in the gully area under compound key strata

Energy Science &Engineering, Volume 12, Issue 4, Page 1745-1758, April 2024.
In view of the problem strong rock pressure is easy to occur in coal seam mining in western gully terrain. Through similar simulation, theoretical calculation and analysis, numerical simulation and field measurement, the mechanism of strong rock pressure in the gully area was analyzed.
Xingping Lai, Haoyu Zhu, Pengfei Shan, Yun Zhang, Longquan Wu, Hao Qiao, Haozhou Zhao, Ziqiang Dai   +7 more
wiley   +1 more source

Stratigraphy, palaeogeography and evolution of the lower Nanaimo Group (Cretaceous), Georgia Basin, Canada

Basin Research, Volume 36, Issue 1, January–February 2024.
The siliciclastic lower Nanaimo Group records the initiation and depositional evolution of a forearc basin (Georgia Basin, Canada). Our research revises the traditional lithostratigraphic framework and proposes a new stratigraphic framework for the lower Nanaimo Group.
Kristian Girotto, Shahin E. Dashtgard, Chuqiao Huang, James A. MacEachern, H. Daniel Gibson, Gwyneth Cathyl‐Huhn   +5 more
wiley   +1 more source

Petrographic Controls on Pore and Fissure Characteristics of Coals from the Southern Junggar Coalfield, Northwest China

Energies, 2018
The productive potential of coalbed methane projects is controlled by pore and fissure characteristics, which are intrinsically related to coal petrology. This work attempts to identify the influence of petrographic factors on the development of pore and
Sandong Zhou, Dameng Liu, Yidong Cai, Zuleima Karpyn, Yanbin Yao   +4 more
doaj   +1 more source

Groundwater renewal capacity of Jurassic coalfields in northern Ordos Basin

Meitan xuebao
With the westward shift of the focus of coal mining, the Jurassic coalfield in the northern Ordos Basin has become an important energy security base in China.
Jian YANG, Yue PU, Hui LI
doaj   +1 more source

Logging identification of karstified Jurassic conglomerate aquifer in the Zhuxianzhuang coal mine: implications for water abundance heterogeneity and mining risk mitigation

Frontiers in Earth Science
The Jurassic conglomerate aquifer in the coal seam roof of Zhuxianzhuang Coal Mine in the Huaibei Coalfield exhibits significant karst and water-rich heterogeneity, and its geological patterns remain poorly understood.
Zhu Guanyu, Zhu Guanyu, Jiang Bo, Jiang Bo, Li Ming, Li Ming, Song Yu, Song Yu, Cheng Guoxi, Cheng Guoxi   +9 more
doaj   +1 more source