To　explore　solutions　for　reinforcement　problems　of　broken　rock　masses　in　deep　roadways,　it　is　necessary　to　study　the　performance　of　cement-based　grout　and　its　reinforcement　effect.　In　this　study,　grouting-reinforced　specimens　with　different　particle　sizes　of　broken　coal　were　made,　which　revealed　the　reinforcement　effect　of　grouting　on　the　bearing　capacity　of　broken　coal　and　the　mechanism　for　secondary　bearing　damage　and　the　instability　of　the　reinforced　specimens.　First,　it　was　determined　that　the　appropriate　water-cement　ratio　(W/C)　to　meet　the　field　grouting　conditions　is　0.45.　Second,　the　uniaxial　compression　of　the　grouting-reinforced　specimens　with　0.45　W/C　was　carried　out,　and　acoustic　emission　equipment　was　used　to　detect　it.　Finally,　through　indoor　experiments,　this　study　investigated　the　differences　in　failure　modes,　stress-strain　curves,　and　acoustic　emission　signal　characteristics　among　intact　coal　samples,　grouting-reinforced　bodies　with　different　particle　sizes,　and　grouting-reinforced　bodies　after　anchoring.　The　deformation　and　failure　patterns　of　grouting-reinforced　bodies　were　revealed,　and　the　failure　mechanisms　of　grouting-reinforced　bodies　with　different　particle　sizes　were　elucidated.