摘要
Outburstsofcoalandgasarecloselyrelatedtocoalmicrostructures.Partofmicrostructuresofcoalareassociatedwiththecoal-formingenvironments,butmostofthemareproducedbytectonicdeformation.Inthispaperthetypesofmicrostructuresofcoalaredistinguishedaccordingtothetypesandfeaturesoftectonicdeformations,whichisconvenientandcanbeeasilyemployedbygeologists.BasedontheSEMstudyoncoalpetrographyofNo.4andNo.6coalseamsoftheYutianbaocoalmine,Nantongcoalfield,fivetypesofcoalaredistinguished:nontectoniccoal,microfissurecoal,microcleavagecoal,cataclasticcoalandmyloniticcoal.Themicrostructuralfeaturesofvarioustypesaredescribedindetailandtheirgeologicalimplicationsandrela-tionshipswithcoalandgasoutburstsarealsodiscussed.Specialmentionismadeofaseriesofthefeaturesofplasticdeformationofmyloniticcoal.Itisconcludedthat,otherthingsbeingequal,theplacewithmyloniticcoalisthemostlikelyrisksiteforoutbusts.Theprocessandmechanismofcoalandgasoutburstsaresuggestedbasedonaseriesofchangesinmicrostructuresofthecoalafterbursting.Intheprocessofgasoutbursts,theplasticdeformationissuperimposedbybrittledeformation,thusejectinglargequantitiesofcoaldust.
出版日期
1992年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
