"阻挠议事的行动" can be translated into English as "actions to obstruct or filibuster proceedings" or more specifically in a parliamentary context, "filibustering tactics" (if referring to the deliberate obstruction of legislative business through prolonged speechmaking or other delaying tactics).
"Obstruct proceedings" directly conveys the idea of hindering or blocking the normal flow of business.
"Filibuster" is a term often used in legislative contexts to describe the act of delaying or preventing a vote on a bill by making long speeches or using other parliamentary devices.
Choose the phrase that best fits the context in which you intend to use it.