Results 81 to 90 of about 1,800 (220)

Characteristics and prevention and control techniques of typical water hazards in coal mines in Shaanxi Province

open access: yesMeitan xuebao
Shaanxi province is rich in coal resources and is one of the main coal-producing provinces in China, with a coal production of 746 million tons in 2022. Due to the obvious differences in geological and hydrogeological conditions in the coal mining areas ...
Shuning DONG   +7 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

open access: yesGeofluids, 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   +7 more
wiley   +1 more source

Rediscovery of Ooline, Cadellia pentastylis, near Gunnedah : notes on the habitat and ecology of this dry rainforest tree [PDF]

open access: yes, 2013
Cadellia pentastylis F.Muell., (family Surianaceae), a dry rainforest tree with a conservation listing of Vulnerable at state and national levels, was first collected from the Gunnedah area by the botanical collector J.L. Boorman in 1907.
Curran, Sandra R., Curran, Timothy J.
core  

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

open access: yesPapers 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   +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

open access: yesThe 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   +4 more
wiley   +1 more source

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

open access: yesEnergy 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   +7 more
wiley   +1 more source

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

open access: yesEnergies, 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   +4 more
doaj   +1 more source

Uplift, Climate and Biotic Changes at the Eocene-Oligocene Transition in Southeast Tibet [PDF]

open access: yes, 2018
The uplift history of southeastern Tibet is crucial to understanding processes driving the tectonic evolution of the Tibetan Plateau and surrounding areas.
Deng, Cheng-Long   +15 more
core   +3 more sources

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

open access: yesBasin 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   +5 more
wiley   +1 more source

Groundwater renewal capacity of Jurassic coalfields in northern Ordos Basin

open access: yesMeitan 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

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