Results 1 to 10 of about 41,310 (228)
Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism. [PDF]
ACS Omega, 2023 To accurately determine the effective extraction radius of directional long drilling, the influence of the negative pressure of the hole mouth, the drilling diameter, and the drilling length of the hole on the effective extraction radius of a directional long drilling hole is simulated by establishing a coal-to-gas gas-structure coupling model ...
Liu J, Wu Z, Lu P, Liu Z, Su M.
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Theoretical, numerical, and experimental analysis of effective extraction radius of coalbed methane boreholes by a gas seepage model based on defined criteria [PDF]
Energy Science & Engineering, 2020 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 radius of ...
Hao Xu +5 more
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Research on Influencing Factors of Effective Gas Extraction Radius in Coal Mine Based on Multiple Linear Regression [PDF]
Advances in Materials Science and Engineering, 2022 In order to analyze the influence degree of different factors on gas extraction radius, on the basis of coal seam gas flow theory and elastic mechanics, considering the influence of coal seepage rate change on gas flow, the COMSOL Multiphysics numerical ...
Yuqi Shang +4 more
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Effective Methane Extraction Radius after High-Pressure Water Jet Slotting [PDF]
Geofluids, 2020 The effective radius of methane extraction after high-pressure water jet slotting is the most important parameter for borehole optimization and extraction time planning.
Hu Ke, Xia Binwei, Liu Chengwei, Lu Yiyu
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Study on effective extraction radius of bedding borehole under the impact of normal fault
Gong-kuang zidonghua, 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 a ...
JIANG Mingquan +4 more
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The In-Hexagon Borehole Layout for the Optimization of the Effective Radius of Gas Extraction
Sustainability, 2023 This research was conducted in order to study the relationship between gas geology (initial gas pressure, initial permeability, and buried depth) and effective extraction radius and to achieve precise borehole layouts. Based on the in-hexagon borehole layout mode, the influence of geological factors on borehole effective extraction radius is ...
Congrui Zhang +2 more
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Study on reasonable criterion of effective extraction radius based on desorption gas index
Meikuang Anquan, 2021 In order to get the real effective drainage radius to guide the gas pre-drainage in mining-coal bed, this paper starts from the essential goal of gas extraction, based on the requirements of gas extraction up to standard, establishes the core criterion ...
SUN Xiaoming
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Shock and Vibration, 2020 Hydraulic punching technology has recently developed into an effective pressure relief measure and permeability enhancement method for soft and low permeability coalbeds.
Dongdong Xu +3 more
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Energy Reports, 2023 In order to determine the reasonable spacing of gas extraction holes under the increase permeability measures of hydraulic punching taking Jiuxin Coal Industry of Jincheng Mining Area as the engineering background, COMSOL Multiphysics numerical software ...
Xiangjun Chen +5 more
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Sustainability, 2023 Borehole pre-drainage is an important technical means to control a coal mine gas disaster. In order to determine the optimal pre-drainage parameters of Dashucun mine, a coal damage permeability evolution model was established based on coal damage deformation, considering gas adsorption and desorption and the Klinkenberg effect, and a damage fluid ...
Zhang Minbo +2 more
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