Research on fire temperature characteristics and cooling technology optimization of roadway dual fire source

In order to investigate the combustion characteristics of multi fire source caused by “jumping” discontinuous fire spread in the roadway and its related emergency treatment plan, it uses a combination of theoretical analysis and numerical simulation, and construct a fire roadway model by using Pyrosim numerical simulation software. Pyrosim numerical simulation software is used to construct the fire roadway model, and carry out the research on the combustion characteristics of dual fire source under different boundary conditions, the trend of roadway temperature change, the rule of change of critical wind speed, and the cooling effect of wind control and water mist on the joint management of the roadway in the fire zone. The results show that the average temperature and temperature peak are higher and the temperature change rule is more complicated than single fire source, and the average temperature and temperature peak, combustion characteristics and temperature distribution of dual fire source in the fire roadway are related to the fire source spacing; the critical wind speed of different fire source spacing conditions is determined, and the limiting distance of the dual fire source in the working conditions is given; the optimal position of the water mist spray head deployed in the fire roadway corresponding to different wind speeds is determined, and the critical wind speed is given in the critical wind speed; and the cooling effect of water mist and wind control on the joint management of the fire zone is investigated. The optimal position of water mist sprinkler deployment under critical wind speed conditions and the deployment scheme of water mist sprinkler under non-critical wind speed conditions are given, and the joint control scheme can inhibit the heat release rate of the fire source to a certain extent, significantly reduce the temperature peak of the roadway in the fire zone, optimize the personnel escape environment, which can provide the conditions for the rescue work in the underground and provide a reference for the fire prevention and suppression of mines and the management of multi fire source in the underground. The fire escape environment can be optimized.