Research and application of attenuation law about gas explosion shock wave in coal mine

According to the energy released by explosion,the attenuation relation between shock-wave overpressure and the distance from the explosion point was deduced in weak shock wave.Thus,the relation between shock-wave parameters attenuation law and transmission distance and non-linearity relation between shock-wave transmission distance and time were obtained.Comparing the analysis between full scale experiments and deduction,the results of theoretical calculation agree well with those of experiments,which proves that the deduction of the overpressure on the shock wave front attenuating with the propagation distance is reasonable.The influential scope of damage effect by shock wave was theoretically analyzed by using the results of research works above.So the following conclusion can be got: a small explosion can destroy partial ventilation system,while the large-scale explosion with taking part in of coal dust sometimes can bring the tremendous disaster to life and property.