矿业科学学报2024，Vol.9Issue(4)：519-528,10.
基于DIC技术近距离煤层采动裂隙-位移-应变演化规律相似模拟研究
DIC-based similar simulation study on the evolution patterns of mining-induced fracture,displacement and strain in close distance coal seam
摘要
Abstract
This study investigates the fracture evolution patterns of overlying strata under the mining conditions of close-distance coal seams.Taking the 9305 working face of Anshun Coal Mine as the re-search object,this study probed into the evolution of displacement field and strain field during the mining process of close-distance coal seams through physical similarity simulation test.The results show that ①with the continuous advancement of distance from the working face,the overburden strata first form separation cracks and longitudinal cracks,and then the middle part of the goaf is gradually compacted.②The displacement field is asymmetrically distributed in the advancing direction of the working face,The displacement of the overlying rock on the side of the working face is obviously smal-ler than that on the left side of the goaf,and the peak displacement is mainly concentrated in the mid-dle of the goaf.③The maximum principal strain concentration position is asymmetrically transferred from the middle of the goaf to the open-off cut side and the working face side.The concentration de-gree of the open-off cut side is significantly higher than that of the working face side.This reveals that a potential correlation exists between the maximum principal strain concentration position and the gas enrichment area.关键词
近距离煤层/覆岩结构/裂隙演化/位移应变/相似模拟Key words
close distance coal seam/overburden rock structure/fissure evolution/displacement strain/similar simulation分类
矿业与冶金引用本文复制引用
梅福星,尚宇琦,孔德中,张鹏飞,张林,吴仕雄..基于DIC技术近距离煤层采动裂隙-位移-应变演化规律相似模拟研究[J].矿业科学学报,2024,9(4):519-528,10.基金项目
国家自然科学基金(52164002,52064005) （52164002,52064005）
贵州省教育厅2023年度高等学校科技创新团队(黔教技[2023]055号) （黔教技[2023]055号）
贵州省科技计划(黔科合基础-ZK[2024]重点022,黔科合支撑[2023]一般122) （黔科合基础-ZK[2024]重点022,黔科合支撑[2023]一般122）
