Analysis and Adjustment on Unstability of Pressure Balanced System for Fire Prevention and Control
Abstract：According to the pressure balanced system of the fire prevention and control hard to ensure the stable pressure balanced effect in the pressure balanced area, the paper had a study on the pressure balanced system with the local fan-air window adjustment for fire prevention and control. The study showed that the pressure balanced system for fire prevention and control mainly affected by the natural ventilation pressure, frictional ventilation resistance, sealing condition of the coal mining face, air content within the goal, fire and venti- lation pressure and fire tendency development. With the qualitative analysis of each influence factor, the inner and outer pressure differ- ence function of the goal with time variation was obtained. The adjustment method of the pressure balanced system was summarized. When the inner and outer pressure difference of the goaf was more than a certain value, the ventilation leakage of goaf would have high influences to the spontaneous combustion of the coal left in goaf. The pressure balanced system should be adjusted to reduce the inner and outer pres- sure difference of goal. Finally the method was successfully applied to open the sealing of No. 6-201 fully mechanized top coal caving min- ing face in Laiyegou Mine.
Keywords：pressure balanced system for fire prevention and controlunstabilitycoal spontaneous combustiongoal
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( 73-76,79 )