Results 21 to 30 of about 1,794 (218)

Evaluation of carbonification of coals using a portable Raman spectrometer

Journal of Raman Spectroscopy, Volume 54, Issue 11, Page 1220-1232, November 2023., 2023
This study illustrates that it is possible to discriminate among the coals of different degrees of maturation of the carbonaceous matter and other types of carbonaceous matter using the data acquired with a portable Raman spectrometer using spectroscopic parameters: D and G band widths and wavenumber positions.
Adam Culka, Jan Jehlička, Stanislav Opluštil   +2 more
wiley   +1 more source

Safety analysis and water prevention and control technology of coal mining under rivers in Tianzhu Coal Mine

Meikuang Anquan, 2021
Taking 3200 working face of Tianzhu Coal Mine as an example, by analyzing the geological and hydrogeological conditions of the mine, the main water filling source and water filling channel of the mining face are determined.
HUANG Hao, FANG Gang, LIANG Xiangyang, LIU Yang
doaj   +1 more source

Evolution of depositional environment of the Pliensbachian Stage (Lower Jurassic) coal‐bearing series in the Qaidam Basin, NW China

Geological Journal, Volume 58, Issue 10, Page 3948-3963, October 2023., 2023
The Pliensbachian Stage mainly developed as a fluvial‐lacustrine depositional system and an evolution history from braided fluvial to meandering fluvial, then to lacustrine, and finally back to meandering fluvial was reconstructed. We suggest that climate change is the major controlling factor for depositional evolution during the Pliensbachian.
Kai Zhou, Wanqing Wang, Minfang Yang, Ran Gao, Haoqing Liu, Longyi Shao, Jing Lu   +6 more
wiley   +1 more source

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   +1 more source

Research on the evolution and height prediction of WCFZ in shallow close coal seams mining

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
Based on the mining conditions of shallow close coal seams in the Jurassic coalfield of northern Shaanxi, in order to explore the evolution and development height prediction of water-conducting fracture zone (WCFZ), combining with measured statistical ...
Jian Cao, Haitao Su, Chao Wang, Jianwei Li   +3 more
doaj   +1 more source

Exploration technology of integrated air leakage channel of shallow buried coal seam in northern Shaanxi Province

Meikuang Anquan, 2023
Taking the fire-threatened mines in the shallow buried coal seam of the Jurassic coalfield in northern Shaanxi Province as the research object, the high-resolution UAV visible light and thermal infrared dual-light low-altitude remote sensing, handheld ...
WANG Haijun, WU Yan, MA Liang, CHEN Chongfeng, SUN Baoping, WANG Xiangye, WU Minjie, LIU Shande
doaj   +1 more source

Study on the effect of rock stratum structure on the stability of weakly cemented layered floor and the floor control measures: A case study of Meihuajing Mine

Energy Science &Engineering, Volume 11, Issue 7, Page 2238-2252, July 2023., 2023
A study on the stability of weakly cemented layered floor. Abstract Given the deformation and instability of the layered floor of weakly cemented soft rock roadway, taking the mining roadway of Meihuajing Mine as the engineering background, the deformation and instability mechanism of the floor and the control measures of the surrounding rock under ...
Ye Zhu, Xin‐zhu Hua, Yong‐liang Li, Wei‐yu Li, Ke Yang   +4 more
wiley   +1 more source

Typical model of water damage in Jurassic shallow coal seam mining and its zoning

Meikuang Anquan, 2021
The mining of Jurassic shallow coal seam in northern Shaanxi coal base is faced with a variety of water hazards, and the traditional coal mine water hazard assessment has some limitations, so it is necessary to carry out more detailed water hazard model ...
MIAO Yanping, YU Bo, JI Zhongkui, CHEN Xiaosheng, LU Bo, XUE Xiaoyuan   +5 more
doaj   +1 more source

Selenium and tellurium concentrations of Carboniferous British coals [PDF]

, 2019
The authors wish to thank Kier Group, the British Coal Utilisation Research Association (BCURA) and Uniper (E.On) for kindly providing coal samples.
Armstrong, Joseph, Bullock, Liam A., Feldmann, Joerg, Flores, Erico M. M., Henn, Alessandra S., Mello, Paola A., Mesko, Marcia F., Parnell, John   +7 more
core   +1 more source

‘A hard rain's a‐gonna fall’: torrential rain, flash floods and desert lakes in the Late Triassic Arden Sandstone of Central England

Geology Today, Volume 39, Issue 3, Page 90-98, May/June 2023., 2023
The Arden Sandstone Formation of central and western England is a thin but conspicuous arenaceous unit within the Late Triassic Mercia Mudstone Group. Sedimentological and palaeontological data point to lacustrine depositional conditions, in contrast to the red desert mudstones above and below which were deposited as continental dryland desert ...
Stuart D. Burley, Jonathan D. Radley, Robert A. Coram   +2 more
wiley   +1 more source