Deformation mechanism and support technology of soft and extremely fractured coal-rock roadway with large deformation
Du Shaohua
Yu Weijian
Zhang Tianlian
Zhao Jianfeng
Abstract：In view of the support control problems,such as large deformation and severe support structure damage of fragile coal-rock roadway under complex geological conditions,this paper took No.1301 haulage roadway as the research object and on-site engineering research and laboratory test as the methods,concluded the deformation and failure mechanism of coal-rock roadway,put forward to an integrated and optimized supporting scheme-“whole anchor cable (long and short anchor cable)+metal net + steel belt",and analyzed the supporting effects of original scheme and optimized scheme contrastively by FLAC3D software.The results showed that,the optimized scheme effectively controlled the deformation of surrounding rock of the roadway and released the surrounding rock stress to a greater degree,which formed a relatively integrated system.According to the site monitoring,final convergence of two roadway sides was 327 mm and roof and floor 239 mm,and later convergence got smaller and stable;anchor cable press increased quickly in first 20 days and then decreased,but the anchor force reached to a high stable value eventually,which effcctively controlled the large deformation of roadway.
Keywords：large deformationcoal-rock roadwaydeformation mechanismintegrated supporting scheme
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 15-21,56 )