Modeling of Flow Field and Partition of Spontaneous Combustion Danger Zone in Gob of Fully Mechanized Caving Face in Deep Coalmine
Abstract：As increasing the mining depth in coalmine,the series calamities are happened by more and more strengthening mining strength and rising ground temperature.The danger of preventing and extinguishing technology of spontaneous combustion in goaf of fully mechanized caving face in deep and high temperature coalmine was analyzed,the and oxygen concentration field and air-leakage flow field in goaf of top-coal caving with false dip in thick seam was studied.Through numeric simulation,distribution of oxygen concentration and velocity of air flow in mined out area are deter-mined.With the simulating result together with critical value and the duration of coal spontaneous combustion obtained from experiment,boundary of self-heating zone is partitioned,and got the safe advancing is 2.56m/d.
Keywords：high ground temperaturedeep shaftnumerical simulationgoaf
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)