ON BELT CONVEYOR FIRE POSSIBILITY CAUSED BY COAL CHIPPING IGNITION

In coal industry three areas of re safety on conveyor belts are formed: the creation and application of non ammable (slow-burning) conveyor belts; development and application of belt conveyor operation and management control means, eliminating the unauthorized interference; development and application of automatic re extinguishing systems. In this article the rst direction based on the paragraphs 2.2.1 RD 03-423-01 "Safety standards on conveyor belts for hazardous production facilities and the test methods" is considered where it is stated that there must be no belt frictional ignition on the drum of a test installation the temperature of which is 500°C, and for polyvinylchloride belts - less than 325 °C. The article describes the hypothesis of the thermal pulse impact on the belt and coal chipping. This impact is enough to ignite the latter and a re initiation on a conveyor belt. Measurements of the ignition temperature for the various coal mines in Kuzbass were carried out. Comparison of the ignition temperature of various coal grade chipping with belt conveyor parts and assemblies temperatures when operation was not correct allows to suggest that in ammation may occur, ie chipping in ammation can be a source of re on a conveyor belt.