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By analyzing the ventilation system’s sensitivity and studying the ventilation pipeline model, it puts forward the concept of sensitivity branch and the selection method, i.e. selecting the top 20% branches which have the biggest α value. Sensitivity branch plays an important role in managing the ventilation system efficiently, judging the abnormal wind amount and guiding the construction of new mine alleys.

The ecological safety is actually a social project, a civilization project and a quality project, not only it needs the whole society to retrospect and reform from the following aspects as the idea, the action mode, the ethic responsibility and laws & regulations, etc. but also it needs each one of us to take part in it, implement it conscientiously and make contributions to the social civilization progress. We enjoy the ecological safety each and every one, so we should construct it together and take on our tasks and responsibilities accordingly.