煤矿安全2024，Vol.55Issue(6)：151-159,9.DOI:10.13347/j.cnki.mkaq.20231386
厚松散层薄基岩煤层开采地表沉降速度及其影响因素研究
Research on surface subsidence velocity and influencing factors by coal mining under thick loose layers and thin bedrock
摘要
Abstract
To study the law of surface subsidence velocity caused by coal seam mining under thick and loose layers and thin bedrock,taking the 110801 first mining face of a mine in Huainan Mining Area as the engineering background,the finite difference software FLAC3D was used to simulate the surface subsidence velocity of coal mining under the conditions of different mining speed,mining height,mining width,loose layer thickness and bedrock layer thickness conditions,and the influence mechanism and sensitivity of various parameters on the surface subsidence velocity were obtained.The results indicate that:the surface subsidence velocity in-creases with the increase of mining speed,mining height and mining width,but decreases with the increase of foundation rock thick-ness and loose layer thickness;the maximum surface subsidence velocity increases linearly with the increase of mining speed,min-ing height and mining width,and decreases linearly with the increase of loose layer thickness,which decreases in power function with the thickness of bedrock layer;the sensitivity of each influencing factor to the maximum surface subsidence velocity is mining width,bedrock layer thickness,loose layer thickness,mining speed and mining height in descending order.关键词
厚松散层/薄基岩/FLAC3D/地表沉降速度/敏感性Key words
thick loose layer/thin bedrock/FLAC3D/surface subsidence velocity/sensitiveness分类
矿业与冶金引用本文复制引用
张佳明,程桦,张亮亮..厚松散层薄基岩煤层开采地表沉降速度及其影响因素研究[J].煤矿安全,2024,55(6):151-159,9.基金项目
安徽省高校科研资助项目(2023AH051203) （2023AH051203）
安徽理工大学高层次引进人才科研启动基金资助项目(2022yjrc32) （2022yjrc32）
国家自然科学基金资助项目(51874005) （51874005）
