Experiment Research on Deposited Coal Dust Explosion Occurred by Gas Explosion Shock Wave

In order to study the second explosion law occurred by deposited coal dust flying and explosion after the mine gas explosion,a horizontal pipeline type gas dust explosion device was applied and the device was divided into two section with the explosion proof membranes.During the experiment,the first section of the pipeline was filled with the gas and the second section of the pipeline was filled coal dust.After the gas explosion,the explosion wave would break the membrane and cause shock waves and flying to induce the deposited coal dust explosion and the second explosion occurred.With the gas content,dust particle and dust concentration varied,the experiment research were conducted on the max explosion pressure and the pressure increasing rate of the second explosion occurred by deposited coal dust due to the shock waves flying and induced after the gas explosion.The research results showed that the max explosion pressure and the pressure increasing rate would be firstly increased and then reduced with the gas content and coal dust concentration and would be reduced with the particles of the coal dust increased.