Results 1 to 10 of about 40,857 (187)
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.
europepmc +4 more sources
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 ...
Luwei Zhang +2 more
exaly +2 more sources
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 ...
Dangyu Zhang +2 more
exaly +2 more sources
Physical Review D, 2023 The MUSE experiment at Paul Scherrer Institute will perform the first measurement of low-energy muon-proton elastic scattering (muon lab momenta 115-210 MeV) with the aim of determining the proton charge radius. We study the prospects for the proton radius extraction using the theoretical framework of Dispersively Improved Chiral Effective Field Theory
F Gil-DomÃnguez, J M Alarcon
exaly +4 more sources
Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory [PDF]
Physical Review C, 2019 8 pages, 5 ...
J M Alarcon, D W Higinbotham, Z Ye
exaly +5 more sources
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 simulation software is secondarily developed by using the stress-seepage coupling mathematical model
Yuqi Shang +4 more
openaire +2 more sources
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. We applied a steady flow model and thermal-hydrological-mechanical (THM) coupling model to calculate the effective radius after high-pressure water jet slotting.
Hu Ke, Xia Binwei, Liu Chengwei, Lu Yiyu
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Significance of Determining the Extraction Radius for Mine Safety and Efficient Resource Development. [PDF]
ACS OmegaWei S +8 more
europepmc +2 more sources
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. Different coal outputs directly affect the shape and size of boreholes as well as the effective extraction radius. Taking the Zhongmacun mine as an example, the influence of different
Dongdong Xu +3 more
openaire +2 more sources