Results 11 to 20 of about 441,091 (198)

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
doaj   +2 more sources

Significance of Determining the Extraction Radius for Mine Safety and Efficient Resource Development. [PDF]

ACS Omega
Coalbed methane (CBM) extraction plays a dual role in ensuring the safety of coal mines and enriching clean energy resources. The extraction radius of CBM boreholes is influenced by multiple factors, but the interactions of the factors and their ...
Wei S, Liu X, Zhang Y, Xie J, Ni X, Lin H, Cheng M, Li B, Li L.   +8 more
europepmc   +2 more sources

Research on the Effective Extraction radius of Directional Long Boreholes for Coalbed Methane Extraction Based on Gas Extraction Quantity Measurement

Academic Journal of Science and Technology
In order to solve the problems of low utilization rate of coalbed methane and difficult gas control in the working face caused by the difficulty of ordinary drilling construction for gas extraction in a high gas mine, a study was conducted on the effective extraction of coalbed methane using directional long drilling in the 2212 working face of a ...
Yifan Wang
openaire   +2 more sources

Sensitivity analysis on borehole effective extraction radius variation based on multiple linear regression model

International Journal of Science and Research Archive
To investigate effects of multiple factors on effective extraction radius of gas drainage borehole, a mathematical gas-solid coupling model is developed. Impacts of original gas pressure, borehole diameter, extraction time and initial coal permeability on effective extraction radius are qualitatively studied by adopting Comsol Multiphysics analysis ...
null Bailon Sitso Takramah, null Chunshan Zheng, null Xing Li   +2 more
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Accurate nucleon electromagnetic form factors from dispersively improved chiral effective field theory

Physics Letters B, 2018
We present a theoretical parametrization of the nucleon electromagnetic form factors (FFs) based on a combination of chiral effective field theory and dispersion analysis.
J.M. Alarcón, C. Weiss
doaj   +3 more sources

Optimization of drilling parameters for coal seam gas extraction considering fluid–solid coupling and field application

Energy Science & Engineering
Affect gas extraction efficiency to find out the optimum well location parameters, based on the gray correlation analysis of borehole diameter, borehole spacing, and extraction pressure three boreholes parameters that influence efficiency of gas ...
Wang Yang, Xu Mengtang, Kong Dezhong, Shang Yuqi, Li Fei   +4 more
doaj   +2 more sources

Coupling mechanism of THM fields and SLG phases during the gas extraction process and its application in numerical analysis of gas occurrence regularity and effective extraction radius

Petroleum Science, 2022
Hui-Huang Fang, Chun-Shan Zheng, Ning Qi, Hong-Jie Xu, Hui-Hu Liu, Yan-Hui Huang, Qiang Wei, Xiao-Wei Hou, Lei Li, Shuai-Liang Song   +9 more
openaire   +2 more sources

Benchmarking Point Cloud Feature Extraction with Smooth Overlap of Atomic Positions (SOAP): A Pixel-Wise Approach for MNIST Handwritten Data

AppliedMath
In this study, we introduce a novel application of the Smooth Overlap of Atomic Positions (SOAP) descriptor for pixel-wise image feature extraction and classification as a benchmark for SOAP point cloud feature extraction, using MNIST handwritten digits ...
Eiaki V. Morooka, Yuto Omae, Mika Hämäläinen, Hirotaka Takahashi   +3 more
doaj   +2 more sources

Numerical simulation study on influencing factors of hole spacing of hydraulic punching based on the effective extraction area

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, Pengfei Cui, Rui Min, Siyu Nie, Xiaozhen Dong, Zhen Huang   +5 more
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Response surface analysis of influencing factors of borehole gas extraction effect

Meikuang Anquan, 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.
GONG Xuanping, XUE Sheng, HAN Baiqing, NIAN Futian, ZHENG Chunshan, CHENG Xiaoyu   +5 more
doaj   +1 more source