煤矿安全2017，Vol.48Issue(8)：23-27,5.DOI:10.13347/j.cnki.mkaq.2017.08.007
岩石峰后蠕变试验及其在沿空留巷底鼓研究中的应用
Experimental Study on Floor Heave in Stable Stage of Gob-side Entry Retaining
摘要
Abstract
In order to obtain the mechanism and control countermeasures of floor heave in stable stage of gob-side entry retaining,creep test of post-failure rock is performed to study the impact of damage degree and confining pressure increment on creep prop erties of post-failure rock.The results showed that:the smaller damage degree of the post-failure rock,the smaller of its creep rate and the longer of its self-stability time;the increase of confining pressure can reduce the practical bearing equivalent stress of the post-failure rock and then improve its creep properties.The paper draws a conclusion that the form of floor heave in stable stage of gob-side entry retaining roadway is creep deformation of post-failure rock in floor fracture region and slippage of displaceable blocks along failure surface.关键词
峰后蠕变/损伤程度/围压增量/沿空留巷/底鼓机理Key words
post-failure creep/damage degree/confining pressure increment/gob-side entry retaining/floor heave mechanism分类
矿业与冶金引用本文复制引用
于宝种..岩石峰后蠕变试验及其在沿空留巷底鼓研究中的应用[J].煤矿安全,2017,48(8):23-27,5.基金项目
国家科技重大专项资助项目(2016ZX05067001-004) （2016ZX05067001-004）
国家自然科学基金资助项目(51374236) （51374236）
