煤矿安全2017，Vol.48Issue(2)：200-203,4.DOI:10.13347/j.cnki.mkaq.2017.02.054
厚硬火成岩下采动离层发育规律与判别方法
Development Laws and Discriminated Method of Separation Stratum Induced by Coal Mining Under Thick Hard Igneous Rock
摘要
Abstract
For the project case of mining under thick hard igneous roof,through theoretical analysis of the formation mechanism and conditions of separated stratum space,we discriminate "cavity type" separation location of the first face in study area.The process simulation and dynamic monitoring analysis are adopted to simulate the characteristics of the evolution of separation stratum space and deformation of overburden strata through numerical method and optical fiber monitoring technology.Research shows that:a total of 5 roof rock at the first primary face can develop the "cavity type" separation stratum space.The movement of overburden hard strata can also be divided into four steps which are named lower support,extension of the bottom separated stratum space,instability movment and closure of separated stratum space.The optical fiber monitoring value of tensile stress in separated stratum location increases gradually.The separation stratum develops gradually from the lower strata to upper strata until the upper igneous rock when the overburden strata of separation stratum loses stability by its self-weight stress.The results are consistent with the numerical simulation and theoretical discrimination.关键词
离层空间/空腔型/数值方法/光纤监测/厚硬火成岩Key words
separation stratum space/cavity type/numerical method/fiber monitoring/thick hard igneous rock分类
矿业与冶金引用本文复制引用
杨文丰,李小琴,李文平,王启庆..厚硬火成岩下采动离层发育规律与判别方法[J].煤矿安全,2017,48(2):200-203,4.基金项目
国家重点基础研究发展计划(973计划)资助项目(2015CB251601) （973计划）
国家自然科学基金资助项目(41430643) （41430643）
江苏高校优势学科建设工程资助项目 （）
