Damage stability is the stability（）.

A.which exists when the wind speed is less than 50 knots

B.before collision

C.after flooding

D.at the maximum load

当矿井发现瓦斯、煤尘爆炸时，要沉着冷静，采取措施进行自救。具体方法是：面向空气颤动的方向，仰卧倒地，用毛巾捂住口鼻，防止把火焰吸入肺部。