Power reliable analysis of coalmine emergency monitoring system in catastrophic environment

The emergency refuge system is significant for coalmine safety in catastrophic Environment. The emergency monitoring is the important part of the emergency system, which detects lots of parameters of the system. In order to assess the reliability of the underground substation power in the coalmine emergency monitoring system, the accelerated life tests under constant stress were presented based on the exponential distribution. Through a comparative analysis of lots of factors, the temperature was chosen as the constant accelerated stress parameter. With regard to the data statistical analysis, the type-I censoring sample method was put forward. The mathematical model of the coal mine monitoring power supply was established and the average life expectancy curve was obtained under different temperatures through the analysis of experimental data. The results demonstrated that the mathematical model and the average life expectancy curve were fit for the actual very well. It is concluded that the reliability study of the substation power provides an important foundation for the coalmine emergency monitoring system.