问题
多项选择题
装备矿井安全监控系统的机械化采煤工作面经采取必要措施后，并符合（）的要求，回风巷风流中瓦斯最高允许浓度为1.5%。
A．工作面的风流控制必须可靠
B．必须保持通风巷的设计断面
C．工作面采用局部通风机通风
D．必须配有专职瓦斯检查工
答案
参考答案：A, B, D
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装备矿井安全监控系统的机械化采煤工作面经采取必要措施后，并符合（）的要求，回风巷风流中瓦斯最高允许浓度为1.5%。
A．工作面的风流控制必须可靠
B．必须保持通风巷的设计断面
C．工作面采用局部通风机通风
D．必须配有专职瓦斯检查工
参考答案：A, B, D
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