Experimental Study on Floor Heave in Stable Stage of Gob-side Entry Retaining
YU Baozhong
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.
Keywords：post-failure creepdamage degreeconfining pressure incrementgob-side entry retainingfloor heave mechanism
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 23-27 )