Zobrazeno 1 - 10
of 49
pro vyhledávání: '"extraction radius"'
Numerical simulation analysis of effect of borehole gas extraction under fluid‐structure interaction
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 11, Pp 5185-5199 (2024)
Abstract To study the effect of coal pressure on gas extraction under fluid‐solid coupling, the effect of gas extraction radius under different pore sizes and treatment methods was simulated by using COMSOL Multiphysics software, the time evolution
Externí odkaz:
https://doaj.org/article/f5f8f34989ad452c946c13184998de3e
Publikováno v:
Meitan kexue jishu, Vol 52, Iss S1, Pp 47-61 (2024)
Mine gas extraction has the dilemma of low extraction rate, short effective extraction cycle, and substandard gas pre-extraction concentration. In order to realize the precise pressure relief and permeability of high gas and low gas permeability coal
Externí odkaz:
https://doaj.org/article/bca6ef0a98274eb0bcd95484db4887f3
Autor:
NI Xing
Publikováno v:
Gong-kuang zidonghua, Vol 49, Iss 1, Pp 146-152 (2023)
In the process of hydraulic cutting in low permeability and high gas coal seams, there are problems such as unclear cutting disturbance range and unclear optimal hole spacing for cutting drilling. In order to solve the above problems, the 1908 workin
Externí odkaz:
https://doaj.org/article/183445f06efa45c7b896526f908c3777
Publikováno v:
Meikuang Anquan, Vol 53, Iss 11, Pp 176-183 (2022)
In order to investigate influence of different factors on borehole gas drainage performance, in-situ stress field test in targeted mining area was carried out. The theoretical model of gas migration in coal matrix fracture system was established, and
Externí odkaz:
https://doaj.org/article/c99c2ab2122d45e2b389847a96f76731
Publikováno v:
Applied Sciences, Vol 14, Iss 8, p 3202 (2024)
Based on the ‘three highs and one low’ geological conditions of high gas pressure, high gas content, high ground stress, and low permeability in deep coal seams, this study proposes a dual method of hydraulic fracturing of key layers of overlying
Externí odkaz:
https://doaj.org/article/c1bcd00a41604c5b953da437df218361
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Publikováno v:
Energy Reports, Vol 8, Iss , Pp 287-294 (2022)
The gas extraction radius is affected by coal seam gas pressure, borehole diameter, extraction time, extraction negative pressure and other factors. Under the coupling of different factors, the gas extraction radius of borehole is also different. For
Externí odkaz:
https://doaj.org/article/28b89096a61b4e7b9e2e912bfec08bd9
Publikováno v:
Gong-kuang zidonghua, Vol 48, Iss 2, Pp 55-60 (2022)
The reasonable effective extraction radius of borehole is the key to ensure gas extraction effect. However, the research of effective extraction radius mainly focuses on the measurement method of effective extraction radius of borehole, and there is
Externí odkaz:
https://doaj.org/article/745d7d19b1564ab38445460a5926330a
Autor:
DU Jinlei, ZHANG Minbo1,2,, ZHANG Dianji, ZHANG Dangyu, ZHANG Zhen, CUI Li, WANG Zichao, LI Chunxin, ZHANG Fujian
Publikováno v:
Gong-kuang zidonghua, Vol 47, Iss 7, Pp 98-105 (2021)
The effect of a single hydraulic cutting is not very ideal for thick coal seam with low permeability or coal seam with gangue to increase the permeability and release the pressure. In order to solve the above problem, taking the 21212 working face of
Externí odkaz:
https://doaj.org/article/bcf5452078dd424da9a686b44242f231
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 3, Pp 880-897 (2020)
Abstract The effective extraction radius of borehole is the main parameter for determining the design and layout for coalbed methane extraction. This paper is aimed at the problem that the criteria and calculation methods for the effective extraction
Externí odkaz:
https://doaj.org/article/561cd8b72dd44b6eb646a10846669b8d