建造防水闸门硐室，进行水平、区上下组煤隔离，是预防水患普遍采用的方法。
A construction of the water dam chamber for isolation between horizontal and up and down seam in a mining district is one of the comment water prevention and control methods.
建造防水闸门硐室，进行水平、区上下组煤隔离，是预防水患普遍采用的方法。
A construction of the water dam chamber for isolation between horizontal and up and down seam in a mining district is one of the comment water prevention and control methods.
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