Results 141 to 150 of about 267 (157)
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Science China Earth Sciences, 2018
The Jurassic is an important period of global coal formation, including the development of several large coalfields in central Asia and northern China. Individual seams within these peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon accumulation ...
Longyi Shao +2 more
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The Jurassic is an important period of global coal formation, including the development of several large coalfields in central Asia and northern China. Individual seams within these peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon accumulation ...
Longyi Shao +2 more
exaly +2 more sources
Review of Palaeobotany and Palynology, 2001
The results of a palynological analysis of the sedimentary sequence of Borehole RCH-151, Chuperbhita Coalfield, Rajmahal Basin, Bihar are presented here. The borehole penetrated the Rajmahal Formation (comprising two traps sandwiching an intertrappean bed), the thinly represented Dubrajpur Formation and in its lower part, the Coal Measures.
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The results of a palynological analysis of the sedimentary sequence of Borehole RCH-151, Chuperbhita Coalfield, Rajmahal Basin, Bihar are presented here. The borehole penetrated the Rajmahal Formation (comprising two traps sandwiching an intertrappean bed), the thinly represented Dubrajpur Formation and in its lower part, the Coal Measures.
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Mechanism and Control of Water Inrush from Separated Roof Layers in the Jurassic Coalfields
Mine Water and the Environment, 2021Theoretical analysis, numerical simulation, and borehole drilling were used to study the mechanism of four large-scale water inrush events that occurred during the mining of the 1121 working face in the Hongliu coal mine in the Ningdong mine area. We concluded that the working face inrush was induced by water in the bed separations formed by overlying ...
Yadong Ji, Haidong Cao, Baofeng Zhao
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2009 2nd International Congress on Image and Signal Processing, 2009
Xinjian Shan
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Xinjian Shan
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World Journal of Engineering, 2013
Twenty-two coal samples and eleven parting samples were taken from Gashun Coal Mine, Hoxtolgay coalfield, Xingjiang Autonomous Region, and the samples were analyzed by using optical microscopy. The results indicate that the dominant macerals are vitrinite (av. 76.6%) with minor amounts of inertinite (av. 18.84%) and low liptinite (av. 2.7%), along with
Jiaolong Li +4 more
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Twenty-two coal samples and eleven parting samples were taken from Gashun Coal Mine, Hoxtolgay coalfield, Xingjiang Autonomous Region, and the samples were analyzed by using optical microscopy. The results indicate that the dominant macerals are vitrinite (av. 76.6%) with minor amounts of inertinite (av. 18.84%) and low liptinite (av. 2.7%), along with
Jiaolong Li +4 more
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Arabian Journal of Geosciences, 2020
The Yuheng mining area of the Jurassic coalfield in northern Shaanxi Province is one of the most important coal-producing regions in China. The present study examines the mechanism of a water-rich coal seam in this area, namely, the No. 2 water-rich coal seam of the Balasu coal mine, by using the groundwater aquifers.
Gang Fang +3 more
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The Yuheng mining area of the Jurassic coalfield in northern Shaanxi Province is one of the most important coal-producing regions in China. The present study examines the mechanism of a water-rich coal seam in this area, namely, the No. 2 water-rich coal seam of the Balasu coal mine, by using the groundwater aquifers.
Gang Fang +3 more
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Journal of Intelligent & Fuzzy Systems, 2019
The risk assessment of roof water inrush is of great significance for sustainable development of mine and ecological environment. Taking the Jurassic coalfield in northwest China as an engineering background, we firstly selected nine indexes influencing roof water inrush based on three essential conditions with the water source, the water inrush ...
Shiliang Liu, Wenping Li
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The risk assessment of roof water inrush is of great significance for sustainable development of mine and ecological environment. Taking the Jurassic coalfield in northwest China as an engineering background, we firstly selected nine indexes influencing roof water inrush based on three essential conditions with the water source, the water inrush ...
Shiliang Liu, Wenping Li
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AAPG Bulletin, 2014
ABSTRACT Detailed stratigraphic and paleogeographic analyses of data from 72 boreholes for the Middle Jurassic intermontane fluvial-lacustrine coal-bearing sequences were conducted in the Yuqia coalfield of the northern Qaidam Basin, northwestern China. Three third-order sequences lasting in total ca.
Meng Li +5 more
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ABSTRACT Detailed stratigraphic and paleogeographic analyses of data from 72 boreholes for the Middle Jurassic intermontane fluvial-lacustrine coal-bearing sequences were conducted in the Yuqia coalfield of the northern Qaidam Basin, northwestern China. Three third-order sequences lasting in total ca.
Meng Li +5 more
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International Journal of Coal Geology, 2012
Abstract The Junggar coal basin, with enormous coal reserves, is one of the largest coal basins in Xinjiang Province, Northwest China. According to the exploration data, there is one to dozens of workable coal seams developed in the Xishanyao Formation of Middle Jurassic across the whole basin, with the maximum accumulated coal thickness of over 100 ...
Jing Li +6 more
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Abstract The Junggar coal basin, with enormous coal reserves, is one of the largest coal basins in Xinjiang Province, Northwest China. According to the exploration data, there is one to dozens of workable coal seams developed in the Xishanyao Formation of Middle Jurassic across the whole basin, with the maximum accumulated coal thickness of over 100 ...
Jing Li +6 more
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Arabian Journal of Geosciences, 2019
Jurassic weathered bedrock is widely distributed in the Jurassic coalfield of Northern Shaanxi Province. Its fracture network is connected with each other well, which provides a good space foundation for groundwater storage. It makes bedrock weathered zone become one of the important aquifers that endanger coal mine safe production.
Zhi Yang +3 more
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Jurassic weathered bedrock is widely distributed in the Jurassic coalfield of Northern Shaanxi Province. Its fracture network is connected with each other well, which provides a good space foundation for groundwater storage. It makes bedrock weathered zone become one of the important aquifers that endanger coal mine safe production.
Zhi Yang +3 more
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