The　coal　cylinder　models　were　static　cracking　destroyed　at　different　rates　by　soundless　cracking　agent.　The　microseismic　signals　in　the　rupture　process　were　monitored　by　ZDKT-1　type　coal　or　rock　dynamic　disasters　experimental　simulation　system.　The　authors　tried　to　analyze　the　amplitude,　energy　and　frequency-spectrum　characteristics　of　microseismic　signals　during　the　static　cracking　of　coal.　It　was　found　that　the　longitudinal　cracks　were　more　than　transverse　cracks　after　the　static　cracking　of　coal,　the　radial　tensile　stress　was　more　obvious　than　the　axial　tensile　stress.　The　static　cracking　process　of　coal　could　be　divided　into　three　stages:　micro　crack　stage,　expansion　stress　transfer　stage　and　cleavage　stage.　With　the　static　explosion　process,　the　greater　of　the　average　amplitude　of　microseismic　signals,　coda　wave　development,　and　the　frequency　domain　of　signals　were　wider　too　(but　dominant　frequency　decrease).　The　frequency　domain　of　main　shock　and　coda　wave　are　different.　It　is　possible　to　evaluate　the　process　of　the　static　cracking　of　coal　seams　by　the　amplitude　of　microseismic,　the　development　of　coda　wave　and　the　spectral　characteristics.　The　microseisms　signals　are　paroxysmal,　the　amplitudes　and　energies　of　microseismic　signals　in　the　static　cracking　process　do　not　change　monotonically,　but　show　volatility　changes.　The　numbers　of　microseismic　events　are　related　to　the　macro　crack　areas.　It　is　possible　to　evaluate　the　permeability　improvement　effect　in　the　process　of　the　static　cracking　of　coal　seams　by　microseismic　count.　©　2017,　Editorial　Office　of　Journal　of　China　Coal　Society.　All　right　reserved.