The coordination control technology of pressure relief and its application in deep roadway
WANG Meng
SI Yingtao
HU Jingbao
DENG Huayi
Abstract：A comprehensive research methods including field measurement,numerical modeling,theoretical analysis,and field test were used to solve the problem of stability maintenance of deep roadway.Based on the analysis of the mechanism of drilling pressure relief in the high-pressure roadwayl,a coordination control technology was proposed for the drilling pressure relief,including the initial pressure yielding,drilling pressure relief and secondary high strength bolt-grouting support.The initial yielding pressure support created constantly resistant deformation in the surrounding rock,and decreased the non-coordinate force caused by the support.The drilling pressure relief could transfer the high confining pressure and compensated the deformation of surrounding rock,and therefore reduced the radial convergence of roadway.The secondary high strength bolt-grouting support,as the core of the controlling technology,was to control the long-term creep of the fractured surrounding rock.It is the parameters used for the drilling pressure relief and the support structure that were determined.The engineering application showed that the technology is able to control the large deformation of surrounding rock in deep roadway,and has a potential value to be applied widely.
Keywords：deep roadwaydrilling pressure reliefstress transfersecondary supportcoordinate control
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：8( 9-16 )