Results 41 to 50 of about 1,800 (220)

Water-rich Partition of Working Face Roof of Deep Buried Mine Based on Comprehensive Exploration Methods

Meikuang Anquan, 2020
The 311101 first mining face in Bayangaole Coal Mine is taken as the example. Before mining in the working face, geophysical exploration project combining transient electromagnetic method with audio frequency electric perspective method are used to ...
LIANG Xiangyang
doaj   +1 more source

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan, Mikhailova, Polina, Nachtergaele, Simon, Van Ranst, Gerben, Vetrov, Evgeny, Vetrova, Natalia, Zhimulev, Fedor   +6 more
core   +1 more source

Evidence for coal forest refugia in the seasonally dry Pennsylvanian tropical lowlands of the Illinois Basin, USA [PDF]

, 2014
The Moscovian plant macroflora at Cottage Grove southeastern Illinois, USA, is a key example of Pennsylvanian (323–299 Million years ago) dryland vegetation.
Balme, Bashforth, Bashforth, Burnham, Campbell, Chaloner, DiMichele, DiMichele, Dimitrova, Dimitrova, Dolby, Eble, Eros, Falcon-Lang, Falcon-Lang, Falcon-Lang, Farley, Feldman, Gastaldo, Gastaldo, Gastaldo, Gastaldo, Greenwood, Havinga, Hofmann, Jackson, Lyons, Mahaffy, Mander, Mander, McElwain, Pfefferkorn, Prentice, Ravn, Ravn, Scheihing, Smith, Spicer, Stewart, Sugita, Van Hoof, Willard   +41 more
core   +4 more sources

Water abundance evaluation of weathered bedrock aquifers based on FAHP and coefficient of variance method

Meikuang Anquan, 2023
The weathering at the top of bedrock in Jurassic coalfield in northern Shaanxi is strong, and the formed weathered bedrock aquifer is the main water filling source of the mine, which poses a serious threat to the safe mining of the mine.
BAI Yang, NIU Chao, LI Fan, XIANG Min, ZHAO Shuhui
doaj   +1 more source

Biomarker signatures of the Middle Jurassic coals from the Zhangjialiang mine in Dongsheng coalfield, North China: Implications for palaeoenvironment and palaeovegetation

Energy Exploration & Exploitation, 2022
The study on the Zhangjialiang No. 2 coal of Middle Jurassic Yan'an Formation in the northeastern Ordos Basin has been analyzed by gas chromatography-mass spectrometry (GC-MS) to determine geochemical characteristics and reconstruct palaeovegetation and palaeoclimate changes.
Ke Zhang, Lin Xiao, Zhixiang Shi, Wenwu Zhao, Zeqi Tian, Zhiyong Wang, Xu Guo, Jianguo Yao, Jialiang Ma, Maksim G Blokhin, Cunliang Zhao   +10 more
openaire   +2 more sources

Fracture activation in the overburden and aquiclude stability under the mining of close-distance coal seams

Meitian dizhi yu kantan
BackgroundIn the Jurassic coalfield of northern Shaanxi Province, the repeated mining of close-distance coal seams exacerbates the activation of fractures in the overburden.
Jian CAO, Haitao SU, Chao WANG, Jianwei LI, Liang LI, Xuwei MAO   +5 more
doaj   +1 more source

Comprehensive Prevention and Control Technology of Goaf Water Damage in Roadway Tunneling

Meikuang Anquan, 2020
The extended tunneling area of the return-air roadway in the second mining area of Weiqiang Coal Mine was taken as the research object. Through the analysis of mine geological and hydrogeological conditions, combined with the previous exploration of ...
WEI Xiaonong, FANG Gang, LIU Yang, LIU Xinghe, BAI Jing
doaj   +1 more source

Corals not serpulids: mineralized colonial fossils in the Lower Jurassic marginal facies of South Wales [PDF]

, 2002
Poorly preserved colonial corals occur near the base of the Lower Jurassic marginal facies at Southerndown, South Wales. Previously they have been interpreted as serpulid colonies, despite a dissimilarity to any serpulids known from elsewhere in the Lias
Little, C.T.S., Rosen, B.R., Simms, M.J.
core   +1 more source

Application of unmanned aerial vehicle in the investigation of hidden disasters on coal mine surface

Meikuang Anquan, 2021
In view of the problems of slow speed, long cycle and terrain limitation in the investigation of hidden disasters on the surface of traditional coal mines, taking the shallow coal seam production coal mine in Shenbei Mining Area of Jurassic coalfield in
WU Minjie
doaj   +1 more source

Hydrochemistry characteristics and connection of aquifers in deep karst mine

Meikuang Anquan, 2023
In recent years, mine water inrush accidents occurred several times in North China type coalfield during the mining process of the upper group of coal, and possessed great threat.
XU Kaiqing, QIAO Wei, LI Wenping, FENG Lushun, LIU Mengnan, CHENG Xianggang
doaj   +1 more source