基于双孔单渗透模型确定有效抽采半径技术研究

doi:10.19286/j.cnki.cci.2023.05.025

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Abstract Aiming at the problem that the effective extraction radius of borehole calculated by numerical simulation method is larger than that of field measurement, the theoretical analysis method is used to study the causes of the error between numerical simulation and field measurement. Based on the analysis results, the coal seam gas migration control equation of double-hole single-permeability model is established. The numerical simulation software was used to study the distribution law of gas pressure under different model conditions. It was found that under the same extraction time, the gas pressure distribution curve calculated by the single-hole single-permeability model was located below the double-hole single-permeability model, indicating that the gas pressure of the single-hole single-permeability model at the same position from the borehole was smaller than that of the double-hole single-permeability model. The field measurement results show that the effective extraction radius of the borehole is 2.64 m, 3.46 m and 4.05 m at 30 d, 60 d and 90 d, respectively. The maximum error between the calculation results and the measured results is only 3.95 %, which is more in line with the actual results.

Key words： effective extraction radius theoretical analysis double-pore single-permeability model numerical simulation

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Cite this article:

Lv Feng. Research on effective extraction radius technology based on double-hole single-permeability model[J]. CCI, 2023, 46(5): 104-107，111..

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.05.025 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I5/104

[ 1 ] 张锋，李大勇，颜文学. 突出煤层群开采层序论证及三区联动瓦斯抽采技术[ J ]. 煤炭技术，2021，40（ 1 ）：74 - 77. [ 2 ] 秦兴林. 水分影响下的烟煤瓦斯吸附特性[ J ]. 煤矿开采，2018，23（ 1 ）：104 - 107. [ 3 ] 张明杰，贾文超，梁锡明，等. 基于瓦斯自然涌出规律的有效抽采半径研究[ J ]. 中国安全科学学报，2018，28（ 10 ）： 98 - 104. [ 4 ] 郭欣，李克文，令狐建设，等. 瓦斯有效抽采半径影响因素的数值模拟研究[ J ]. 煤炭技术，2021，40（ 5 ）：119 - 122. [ 5 ] 张飞，尚玮炜，罗华贵，等. 煤层钻孔瓦斯抽采有效半径影响因素分析[ J ]. 矿业安全与环保，2022，49（ 2 ）：137 - 142. [ 6 ] 张磊，孔金浩，葛生庄. 低渗透采煤工作面本煤层钻孔有效抽采半径的研究[ J ]. 煤炭科学技术，2020，48（ S2 ）：184 - 187. [ 7 ] 刘殿平，马文伟. 瓦斯抽采钻孔有效抽采半径测定方法研究 [ J ]. 工矿自动化，2020，46（ 11 ）：59 - 64. [ 8 ] 孙小明. 基于可解吸瓦斯指标的有效抽采半径合理判据研究[ J ]. 煤矿安全，2021，52（ 22 ）：13 - 17. [ 9 ] 邹士超，辛嵩. 煤层瓦斯钻孔有效抽采半径研究[ J ]. 中国安全科学学报，2020，30（ 4 ）：53 - 59. [ 10 ] 杨宏民，邱向雷，吕晓来. 水力造穴“一孔多穴”模式的有效影响半径数值模拟[ J ]. 煤炭技术，2021，40（ 3 ）：98 - 100. [ 11 ] 李守瑞，王正帅，陈广喜. 艾维尔沟矿区综合法确定有效抽采半径技术研究[ J ]. 煤炭技术，2022，41（ 1 ）：115 - 117. [ 12 ] 陈金玉，马丕梁，孔一凡，等. SF6气体示踪法测定钻孔瓦斯抽放有效半径[ J ]. 煤矿安全，2008 （ 9 ）：23 - 25.