In the study of the method to be used in the safe loading of ship, these processes such as the danger identification, risk evaluation, risk control project, charge/benefit analysis and decision making suggestions have been carried out.

This paper introduces the ventilating system of Sitai Coalmine and the condition of the gas pouring-out, and through the formulation of coalmine's reversing scheme, constructs the reversing works, perfects the reversing system of the coalmine, and increases the anti-disaster ability of the coalmine.

According to the need of ventilation research and practical production, the paper made careful analyses about eight ventilation plans and six standards in Pine Mine with step analysis.

The ventilation scheme rationality is demonstraed,the design and modes of ventilation optimized,the effectiveness of tunnel ventilation ensured,and the costs of ventilation operation reduced.

By taking the ventilation scheme of the underground annular driveway of Suzhou railway station as the object of study,the air volume needed both in the normal situation and fire situation was calculated and analyzed.