The development of fire hazard criteria for noise control products in underground coal mines are presented. Qualifying requisites of the criteria include maintaining miners' safety, allowing for maximum use of noise control products, and economic feasibility. The burning process is analyzed for its relationship to fire hazard criteria developed by the National Aeronautics and Space Administration and the Federal Aviation Administration, and the mine environment is analyzed in conjunction with the end-use applications of noise control products. Also, the interim fire hazard specification developed by the Mine Safety and Health Administration is appraised as it applies to end-use applications of noise control products. From these analyses and a literature survey, fire hazard criteria are developed that include an initial screening procedure that evaluates the level of flammability testing required.