Research On Prediction And Prevention Technologies For Coal Spontaneous Combustion Of Luban Coal Mine

Reliable, cheap, clean, determines the coal industry's foundation status in China'snational economic and social development. National Bureau of Statistics data show that in2009 China's coal production reached 3.05 billion tons, increase 12.7% over last year.At this stage, few studies on high-sulfur coal. LUBAN mine is a typical high-sulfurcoalmine ,whose pressure in surrounding rocks are very high,and geological structure of coalfield is fairly complicated. Spontaneous combustion of fully mechanized top-coal caving face1836 in LUBAN is investigated in present study. Firstly, the large experiment device of coalself-ignition is used to study the character, evaluate oxygen consuming rate, calculate CO andCO₂ generating rate and heat releasing intensity of coal self-ignition. Secondly,through on-siteobservation,under the actual mining conditions of 1836 fully mechanized coal face,thefloating coal distribution,the oxygen distribution and leakage law of mine-out area were found;a division index for three zones of mine-out area were confirmed,and the gas dynamic mobilelaw in the scope of three zones was confirmed;the minimal promotion rate and the risk facearea of spontaneous combustion;and the danger of spontaneous combustion when Gobadvancing at different speeds and the actual conditions of spontaneous combustion time wereforcasted.Finally,according to spontaneous combustion forecasting index system and on-siteprevention and extinguishing technologies and equipment,technical countermeasures againstfire were proposed,which were used to guide the on-site work and achieved good results, andprovided a certain reference for coal mines with similar conditions.