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Determination on Effective Drainage Radius of In-Seam Borehole Based on Gas Content Test and Numerical Simulation Calculation Method [PDF]
ACS OmegaIn order to accurately and efficiently determine the effective drainage radius of the in-seam borehole, the advantages and disadvantages of the current effective drainage radius test methods are analyzed, and the method of combining the gas content field and numerical simulation calculation is proposed to accurately determine the effective drainage ...
Shujun Ma +4 more
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Measurement and simulation study on effective drainage radius of borehole along coal seam [PDF]
Energy Exploration & Exploitation, 2019 A measurement study was conducted for the effective drainage radius of borehole along coal seam #9 of the Kaiyuan Coal Mine using the gas pressure method and gas flow method.
Wei Qin +4 more
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Research on determination method of effective drainage radius of gas drainage borehole
Gong-kuang zidonghua, 2020 In order to solve the problems of complex process and lower accuracy in current determination method of effective drainage radius of gas drainage borehole, a determination method of effective drainage radius was put forward, which is based on the law of ...
LIU Dianping, MA Wenwei
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Sustainability, 2023 Crossing borehole is an effective means to eliminate the outburst risk of coal and gas. The influence of borehole inclination angle, borehole diameter, and drainage time on the effective radius of gas drainage are studied by numerical simulation and engineering example verification.
Chuanjie Zhu, Wu Xiao, Ke Li
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Meikuang Anquan, 2020 There is no uniform standard for determining the drainage effective radius of CO2 phase transition fracturing in view of the fact, we analyze the traditional measurement for drainage effective radius, clarify definition of drainage radius.
SUN Zhuoyue, YANG Dong, PEI Yue, SUN Liuwei, MA Xiaomin
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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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Research on effective drainage radius and rational borehole spacing of parallel boreholes
Gong-kuang zidonghua, 2019 In order to determine rational borehole spacing of parallel boreholes for gas drainage, a fluid-solid coupling model of gas drainage was established by deducing gas migration equation of coal seam, deformation equation of coal and rock, and coupling ...
SANG Naiwen, YANG Shengqiang, SONG Yawei
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Measurement of effective radius of gas drainage of bedding drill hole in low permeability coal seam
Gong-kuang zidonghua, 2014 In view of low permeability characteristics of No.3 coal seam in Changping Coal Mine, the effective radius of gas drainage of bedding drill hole was measured and analyzed by improving sealing process with polyurethane-expansive cement and use of hole ...
WANG Xing +3 more
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Study on numerical simulation of effective drainage radius of drilling hole in coal seam
Gong-kuang zidonghua, 2016 A seepage-stress coupling model of coal containing gas was established considering effect of coal permeability changing on gas flow based on coal seam gas flow theory and elastic mechanic.
WEI Fengqing +3 more
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Energy Exploration & Exploitation, 2018 Two indirect parameters influencing coalbed methane (CBM) drainage performances are proposed in this paper, which are effective desorption radius and difference between reservoir pressure and critical desorption pressure (DRPCDP).
Mingjun Zou +5 more
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