Results 1 to 10 of about 44,964 (117)

Theoretical, numerical, and experimental analysis of effective extraction radius of coalbed methane boreholes by a gas seepage model based on defined criteria

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, Gang Wang, Yang yang Guo, Bo Chang, Yanwei Hu, Jiuyuan Fan   +5 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
doaj   +3 more sources

Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism. [PDF]

ACS Omega, 2023
Liu J, Wu Z, Lu P, Liu Z, Su M.
europepmc   +2 more sources

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, KANG Xiangtao, YAN Chaoxing, TANG Meng, WANG Ziyi   +4 more
doaj   +1 more source

Research on Influencing Factors of Effective Gas Extraction Radius in Coal Mine Based on Multiple Linear Regression

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, Guiyi Wu, Dezhong Kong, Yang Wang, Fei Li   +4 more
doaj   +1 more source

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

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   +1 more source

Optimization of multi-hole hydraulic cutting combined extraction parameters under superposition effect

Gong-kuang zidonghua, 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.
NI Xing
doaj   +1 more source

Effective Methane Extraction Radius after High-Pressure Water Jet Slotting

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
doaj   +1 more source

Numerical simulation study on gas drainage by interval hydraulic flushing in coal seam working face

Energy Exploration & Exploitation, 2021
In order to solve the problem of difficult gas extraction in coal mine, a method of gas extraction from coal seam by interval hydraulic flushing is put forward.
Shengrong Xie, Junqi Cui, Dongdong Chen, Ping Chen   +3 more
doaj   +1 more source