Zobrazeno 1 - 10
of 940
pro vyhledávání: '"coal seam gas"'
Publikováno v:
Meitan xuebao, Vol 49, Iss 6, Pp 2675-2690 (2024)
The SC-CO2 jet drilling and completion technology can ensure the stability of coalbed methane wells, improve drilling speed and rock breaking efficiency, and has a wide application prospect. However, the high energy consumption and complex system of
Externí odkaz:
https://doaj.org/article/c8285eb21fee4d108ad31bad8b14e307
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 6, Pp 2661-2675 (2024)
Abstract Gas outbursts pose a significant threat in the mining of deep low‐permeability coal seams. As mining depth increases, there is a rise in coal and gas dynamic disasters, rendering the gas outburst prevention technology from shallow mining a
Externí odkaz:
https://doaj.org/article/d4afb0e0054a41bbb1bb12bfff8af19e
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 4, Pp 164-176 (2024)
Gas content is an important parameter for the prediction of coal and gas outburst risk, the estimation of coal seam gas resource, and the design of mine gas control engineering. Focusing on how to accurately and quickly determine the gas content of c
Externí odkaz:
https://doaj.org/article/cadbecaebcf44e1a91d26149145cb5a6
Akademický článek
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Autor:
JIA Nan
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 3, Pp 122-130 (2024)
Fully understanding the mechanism of coal seam gas migration is the fundamental prerequisite for improving extraction efficiency. At present, research on the micro migration features of coal gas mostly focuses on the micro pore gas migration features
Externí odkaz:
https://doaj.org/article/80e2d47114404cf88bb24450679618a2
Publikováno v:
Gong-kuang zidonghua, Vol 49, Iss 10, Pp 160-164 (2023)
When using open core tube sampling to measure the gas content in deep hole coal seams, the coal sample has a long exposure time. It is prone to pollution, and the gas loss is difficult to measure, resulting in large measurement errors. However, most
Externí odkaz:
https://doaj.org/article/919a258d69b2414eabf98572ff59c9ea
Publikováno v:
International Journal of Coal Science & Technology, Vol 10, Iss 1, Pp 1-13 (2023)
Abstract The gas content is crucial for evaluating coal and gas outburst potential in underground coal mining. This study focuses on investigating the in-situ coal seam gas content and gas sorption capacity in a representative coal seam with multiple
Externí odkaz:
https://doaj.org/article/8929728278554fad9e51e9addecf5d54
Publikováno v:
Meikuang Anquan, Vol 54, Iss 8, Pp 33-38 (2023)
In order to efficiently extract gas in advance before the deep coal seam mining and ensure the safe mining of the deep coal seam, the L-shaped horizontal well drilling technology is one of the main methods of surface gas drainage. There are many diff
Externí odkaz:
https://doaj.org/article/819cb420649947138eadb4b2eb132ec1
Publikováno v:
Frontiers in Energy Research, Vol 12 (2024)
Targeting the problem of a small amount of fluid accumulation in deep coal seam gas (CSG) wells during flowing production stage, the evaporation drainage method is proposed to discharge the liquid accumulation. Based on the Dalton evaporation model a
Externí odkaz:
https://doaj.org/article/7b10dc8a14a2484fad1c26e4de429c17
Publikováno v:
Rock Mechanics Bulletin, Vol 3, Iss 1, Pp 100100- (2024)
Horizontal boreholes have been widely used to extract natural gas from coal seams. However, these boreholes can encounter severe instability issues leading to production interruption. Optimizing drilling azimuth is a potential solution for enhancing
Externí odkaz:
https://doaj.org/article/d101f37e578e46d0ad546c703faa2452