Abstract: To promote lumberyards' fire prevention ability and reduce fire incidence, the improved matter-element extension method is used to evaluate the fire risk in northeast forest lumberyards. Firstly, a fire risk evaluation index system of northeast forest lumberyards was established from personnel, equipment, combustible, environment and management perspectives, which contains five primary indicators and sixteen secondary indexes. Then a matter-element extension model of fire risk assessment of northeast forest lumberyards was set up on the basis of the hierarchical structure of lumberyard fire risk index with quantitative fuzziness taken into consideration so as to complete the fire risk evaluation. The example analysis results show that the improved matter-element extension method can be applied to the fire risk rating of northeast forest lumberyards, and the danger of single fire risk index can be directly expressed with improved radar chart, thus promoting the visualization of fire prevention management and providing theoretical basis for safe production and scientific management of lumberyards.

Key words: northeast forest area, matter-element extension method, lumberyard, index system, fire risk assessment