煤田地质与勘探2018，Vol.46Issue(2)：130-136,7.DOI:10.3969/j.issn.1001-1986.2018.02.020
厚松散层下多煤层重复开采地表移动规律
Study on surface movement characteristics of repeated mining under thick alluvium
摘要
Abstract
In order to study the influence of multi-seam repeated mining under thick alluvium on surface movement,the surface movement characteristics of Guqiao coal mine repeated mining were analyzed based on the geological and mining conditions of Huainan coal mining area.Then FLAC3D numerical simulation model of multi-seam repeated mining under thick alluvium was built,and the surface deformation characteristics and the relationship between the number of parameters and mining times were analyzed.Research results showed that when the first mining under thick alluvium surface subsidence factor is greater than 1,the alluvium is gradually compacted.The surface subsidence coefficient presents the tendency of linear increase with the mining times,but the mining subsidence coefficient tends to be stable when the mining time reaches three as the alluvium has been compacted gradually.When the goaf reaches the supercritical size,the boundary of subsidence basin is no longer increased,but is affected by the mining depth.The tangent of main effect angle and the limit angle have linear increase relationship with mining times.The results provide theoretical basis and technical reference for studying the surface movement characteristics under thick alluvium.关键词
厚松散层/重复开采/地表移动变形/数值模拟/采动次数Key words
thick alluvium/repeated mining/surface movement and deformation/numerical simulation/mining times分类
矿业与冶金引用本文复制引用
蒯洋,刘辉,朱晓峻,郑刘根,陈永春..厚松散层下多煤层重复开采地表移动规律[J].煤田地质与勘探,2018,46(2):130-136,7.基金项目
国家社会科学基金重大项目(14ZDB145) （14ZDB145）
河北省高等学校青年拔尖人才计划项目(BJ201610) （BJ201610）
安徽省高校自然科学研究重点项目(KJ2017A038) （KJ2017A038）
安徽省高校自然科学研究重点项目(KJ2018A0003) （KJ2018A0003）
Chinese Major Projects of National Social Science Foundation (14ZDB145) （14ZDB145）
Youth Top-notch Talents Program in Universities of Hebei Province(BJ2016010) （BJ2016010）
Key Project of Natural Science Research in Colleges and Universities of Anhui Province(KJ2017A038) （KJ2017A038）
The University Science Reaearch Key Project of Anhui Province(KJ2018A003) （KJ2018A003）
