Development and present situation of support theory and technology in coal mine roadway in China

Roadwaysupporttheoryandtechnologyisthecoreresearchfocusofstratacontrolincoal mine.Inthispaper,therepresentativesupportingtheoriesofroadwayaresystematicallysortedout,and thesupportingtechnologiesofroadwayareexpoundedandanalyzedindetailfromthefollowingthreeaspects:surroundingrockinside,roadwaysurfaceandcompositecontrol.Furthermore,the possible researchfocusisdiscussedandanalyzed.Themainconclusionsshowthatthesupportingtheoriessuchas NewAustrianmethod,brokenrockzone,strengthenhancementofsurroundingrockaremoremature, andnewsupportingtheoriessuchascompressionringenhancedsupporttheory,strongsupportforsidewallanduniformstrengthbeamtheoryareemerging.Thetechnologiesinsurroundingrockincludebolt (cable),groutingandpressurerelief,andsurfacesupporttechnologiesmainlyincludemasonryarch, metalsupportandconcrete-filledsteeltubesupport.Whilethecompositecontroltechnologiesmainlyincludegrouting-bolt (cable),shed-cable and grouting-shed-cable composite technology,and the new technology named full space truss and anchor coordinative support is introduced in detail.The synergisticmechanismbetweensurroundingrockandsupportingbody,newsupportingmaterialandsys
tem,pressurereliefmechanismandtechnology,andmaturequantitativesupportdesignmethodstillneed tobedeeplystudiedinfuture.