Influence of three-phase foam on the air leakage at the goaf of a fully mechanized caving face
Abstract：Fluent software was used to model air leakage at the goaf after injection of a three- phase foam. Air diffusion at three distances along the inclination direction were examined. from 10 to 20 m, from 50 to 100 m, and from 100 to 150 m. Three dip angles, 0, 10, and 30 degrees, were considered at the respective oxidation zone widths of 10 to 20 m, 10 to 15 m, and 5 to 10 m. The simulations show that air leakage in the goaf can be significantly reduced. The three-phase foam has an obvious effect in preventing, and controlling, the spontaneous com- bustion of the coal. Three phase foam was applied to the goaf of the 1606, fully mechanized, caving face in the Xinji number 2 coal mine. The oxidation zone width was narrowed from a dis- tance of 60 meters to 15 meters. The volume of air leakage was simultaneously decreased from about 200 to 25 m^3/min. The simulations agree with the field observations.
Keywords：goafthree-phase foamspontaneous combustionair leakage
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 339-343 )