煤矿安全2017，Vol.48Issue(3)：52-55,4.DOI:10.13347/j.cnki.mkaq.2017.03.014
特厚复合顶板离层破坏机理研究
Study on Failure Mechanism of Abscission Layer Failure of Extra-thick Compound Roof
摘要
Abstract
To solve the problem that extra-thick compound roof in Guiqing Coal Mine is easy to cause abscission layer failure and improper maintenance of roadway is easy to lead to large area roof caving accident,based on the theoretical analysis and numerical modeling,we discuss the reasons that extra-thick compound roof rock beam occurs abscission layers and failure features,and reveal the damage laws of rock beam.The results show that the abscission layer failure of compound roof occurs on the both sides of rock beam and then extends to the middle of rock beam;the initial position of rupture failure on both sides of rock beam occurs on the tapper end and the lower end in the middle of rock beam.The causal relationship of roadway instability with extrathick compound roof is joint fissure or fault structure development,low roof rock mass strength,lower rock beam deformation,fracture,abscission layer failure,upper rock beam abscission,fracture failure,surrounding rock instability.关键词
特厚复合顶板/离层破坏/断裂破坏/支护/围岩失稳Key words
extra-thick compound roof/abscission layer failure/rupture failure/support/surrounding rock instability分类
矿业与冶金引用本文复制引用
曹俊才,左宇军,李伟,许云飞..特厚复合顶板离层破坏机理研究[J].煤矿安全,2017,48(3):52-55,4.基金项目
国家自然科学基金资助项目(51574093) （51574093）
贵州省应用基础研究计划重大资助项目(JZ字[2014]2005) （JZ字[2014]2005）
贵州大学校级创新基金资助项目(研理工2016082) （研理工2016082）
