摘要
瓦斯抽采钻孔周围岩性对钻孔的变形失稳有重要影响。以温庄煤矿15103工作面为研究背景,利用UDEC数值模拟软件构建物理模型和数学模型,研究顶板不同岩性对抽采钻孔变形失稳的影响。结果表明,当顶板岩性为细粒砂岩、粉砂岩、泥岩、石灰岩、12煤时,钻孔围岩的最大水平位移数值和最大垂直位移数值逐渐增大;变形小、稳定性好的钻孔有利于瓦斯抽采。
The lithology around gas extraction boreholes has a significant impact on deformation and instability of boreholes.Taking No.15103 working face of Wenzhuang Coal Mine as the research background,a physical and mathematical model was constructed using UDEC numerical simulation software to study the influence of different rock types of roof on the deformation and instability of extraction boreholes.The results indicate that when the roof rock is composed of fine-grained sandstone,siltstone,mudstone,limestone,and No.12 coal,the maximum horizontal and vertical displacement values of the surrounding rock gradually increase;drilling with small deformation and good stability is beneficial for gas extraction.
作者
孙全吉
侯玉军
姚志远
Sun Quanji;Hou Yujun;Yao Zhiyuan(Wenzhuang Coal Industry Co.,Ltd.,Lu′an Chemical Group,Changzhi 046300,China;China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭科技》
2025年第5期130-134,共5页
Coal Science & Technology Magazine
关键词
瓦斯抽采
岩性
钻孔变形失稳
UDEC
数值模拟
gas extraction
lithology
deformation and instability of borehole
UDEC
numerical simulation
