Study On Outburst Dangerous Area Division Technology In Gao-he Coal Mine

As everyone knows, the coal and gas outburst is one of the most serious mine disasters;China adopt the "four in one" concept to predict and control it. In the comprehensive outburstprevention measures of “four in one", the outburst dangerous forecast is the first link, theprediction of outburst can divide the dangerous area and non dangerous area in the coal seam, itcan liberate no outburst danger areas, which can be targeted to take measures against outburst.This paper researches the technology of coal and gas outburst danger area division, which usedby Gao-He coal mine3#coal seam.By reviewing the relevant literature, we find that the gas pressure determination plays adecisive role in the outburst prediction, the measuring accuracy also determines the reliabilityof coal and gas outburst danger area division. Firstly, the paper introduces the principle, currentsituation and existing problems of the technique, and emphasizes that Gao-He coal mine do nothave the condition of gas pressure determination in the drilling of rock, at the same timeintroduces the complexity of gas pressure determination in the drilling of coal. Aiming at thecomplexity gas pressure determination in the drilling of coal, put forward imitation rock poregas pressure determination, through numerical simulation confirms the reliability ofsolidification coal body grouting, and put forward the concrete operation steps of imitation rockpore gas pressure determination. We make contrast experiments for imitation rock pore gaspressure determination in Feng-Hui coal mine, the experiments show that the imitation rockpore gas pressure determination technology effectively overcomes the problems existing in gaspressure determination in the drilling of coal.Finally, we adopt the imitation rock pore gas pressure determination to determine gaspressure of Gao-He Coal Mine3#coal seam, the gas content and expansion energy of initialreleased gas and so on are also be determinate in the laboratory. According to the parametersdeterminate of in the laboratory we research the distribution law of gas pressure, gas contentand expansion energy of initial released, the results of Gao-He coal mine3#coal seam regionpartition is confirmed, which can be used to guide future mining operations. That also act as areference for the coal mine which has similar conditions with Gao-He coal mine.