煤巷、半煤岩巷和有瓦斯涌出的岩巷掘进工作面,甲烷传感器报警浓度、断电浓度、复电浓度分别是()。
A≥1.5%CH4,≥2.0%CH4,<1.5%CH4
B≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C≥0.5%CH4,≥1.0%CH4,<0.5%CH4
D≥1.0%CH4,≥1.5%CH4,<1.0%CH4
A≥1.5%CH4,≥2.0%CH4,<1.5%CH4
B≥1.5%CH4,≥1.5%CH4,<1.5%CH4
C≥0.5%CH4,≥1.0%CH4,<0.5%CH4
D≥1.0%CH4,≥1.5%CH4,<1.0%CH4