It is the gist of accidents managing and the important basis for safety management to analyze and evaluate the accident loss.

In this paper the main content is the analysis of the information asymmetry of the accident loss and the several incidents asymmetric types are summed up in order to make better of the analysis of the accident loss.

In order to construct a proper black start scenario,accelerate system recovery after fault and minimize outage loss,this paper proposes a method for determining the number,capability and location of the generating units in the black start of power systems according to technical performance index of black start and the characteristics of the generators.

So the definition of safety cost is redefined; that is the total expenditure involved in work safety including safety input and accidental loss under the basic safety standard.

Many coalmine accidents attribute to undue controlling behaviors of managers.

Frequent coalmine accidents,which have become the bottleneck of China's construction of harmonious society and the realization of sustaining social and economic progress,receive wide attention from the public policy sector and the related academia.

It has always been a thorny problem to our country's administration of coalmine work safety that coalmine accidents do occur frequently, which result in injuries, fatalities, loss of production or damage to property and assets.

Gas accident is the most serious of all the coal mine accidents and plank accident is the most frequent;although the death number of coal mine accidents above 10 persons have only occupied 3.

Happening of coal mine accidents dues to people s unsafe actions,which are influenced by people s personality.