各矿井采用的密闭采空区的方法和装置,主要是往采空区充填一种能抵制或消除漏风的惰性物质。各矿采用全部充填法充填回采工作面采空区的仅有5～10个采区。在120个回采工作面从回风巷道一侧采用了砌石垛带的方法,石垛带的长度占回采工作面长度的50～70%。而在大量浮煤聚积的采空区下部,内因火灾次数占50～60%,原因是 The method and device of closed mined-out area adopted by each mine is mainly to fill the mined-out area with an inert substance that can resist or eliminate air leakage. All mines filled with filling method to fill the goaf only 5 to 10 mining area. In the 120 mining face from the side of the return airway used masonry belt method, the length of the stone stack belt mining face length of 50 to 70%. However, in the lower part of the gob area where a large amount of floating coal accumulates, the number of internal fires accounts for 50 to 60% because