特厚砂土层条件下的开采沉陷规律研究

摘要

在分析榆树湾煤矿地表移动观测资料的基础上，研究了特厚砂土层条件下的厚煤层开采的地表移动变形规律与特征。揭示了特厚砂土层、薄基岩及大采厚等特殊因素对地表沉陷规律的影响，获得了特厚砂土层开采条件下的地表移动变形特征，研究成果将对榆林煤矿后续的安全合理开采、保安煤柱的留设、环境治理与保护等具有重要的实际意义。%Based on surface movement observation data analysis in the Yushuwan coalmine, studied surface movement deformation pat-tern and characteristics resulted from mining of thick coal seams under extra-thick sandy soil layer condition. The study has revealed impacts from special factors of extra-thick sandy soil layer, thin bedrock and large shear height on surface subsidence patterns, and sur-face movement and deformation characteristics under those conditions. The result has important practical significance in safe rational mining, protective pillar setting, environment management and protection in later stage development of Yulin coalmines.