DOI: 10.11799/ce201801011
Surrounding rock deformation mechanism of deep soft-rock roadway with bolt-grouting support
ZHAI Xin-xian
TU Xing-zi
LI Ru-bo
LI Ming-yuan
LI Peng-yuan
GUO Chun-sheng
Abstract：Deformation control of surrounding rock in deep soft rock roadway has always been the focus and difficulty of coal mine research.We take the dip entry of Dingsi mining district in Pingdingshan No.8 Coal Mine as the engineering background,and study the deformation and failure mechanism of the surrounding rock under the conditions of bolt-shotcreting and bolt-grouting support,by means of on-site industrial tests and numerical simulation calculation.The results show that:compared with the bolt-sbotcreting support,the high stress zone of the surrounding rock of bolt-grouting roadway moves to the deep surrounding rock,the surrounding rock of the shallow part of the roadway is in the stress reducing area,and the stress environment of the surrounding rock of the roadway is improved;the displacements of surrounding rock of bolt-grouting support roadway are all less than the displacements of surrounding rock at the corresponding positions of bolt-shotcreting support.Therefore,bolt-grouting support plays an effective role for the roadway roof and two sides control.The technical measures of secondary grouting of roadway surrounding rock are proposed and implemented,and the grouting technology and grouting parameters are studied,and the roadway surrounding rock deformation has been effectively controlled.
Keywords：deep soft rock roadwaybolt-grouting supportdeformation mechanismnumerical simulationsecondary grouting technology
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 36-41 )