The　safe　and　effective　disposal　of　explosives　is　an　essential　part　in　the　development　of　weapon　systems.　A　new　chamber　for　internal　blast　with　explosion　venting　channel　is　introduced　in　this　article.　The　computation　for　the　design　of　the　chamber　under　blast　waves　loading　is　proposed　for　both　fully　confined　explosion　and　partially　confined　explosion.　In　addition,　damage　from　the　possible　collapse　or　spalling　failure　under　repeating　blasts　is　assessed　and　analyzed　based　on　plane　stress　wave　propagation　theory.