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一、前言井下发生火灾时进行的紧急密闭,除了完全切断风流使火灾熄灭的目的外,还要有能承受密闭内瓦斯爆炸的足够耐压强度。另外,从密闭作业的危险性考虑,其构筑时间要尽可能地短。紧急密闭的构筑方法,大致可分为砂袋和料石混堆的方法及飞灰流送(以下简称FA)方法。后者与前者相比,其优点是高效地完成密闭作业后立即切断风流,作业人
I. Foreword An emergency airtightness in the event of a fire in a well underground, in addition to the purpose of completely cutting off the flow of wind and extinguishing the fire, should also be capable of withstanding sufficient compressive strength to withstand the internal gas explosion in airtightness. In addition, from the risk of confined operations, its construction time should be as short as possible. Emergency sealing method can be roughly divided into sand bag and aggregate mixed method and fly ash flow (hereinafter referred to as FA) method. Compared with the former, the latter has the advantage of cutting off the airflow immediately after the closed operation is completed efficiently, and the worker