DISCUSSION OF THICK COAL SEAM DELAMINATING MINE AND COAL CAVING OF THE FULLY-MECHANIZED OF GAS EFFUSION

From analyzing coal-gas abstracts gas process, we contrasted and analyzed gas gushing rate from working face at high seam in slices and moveable mining. It described the process of coal-gas abstracts gas with exponent sign function and concluded gas gushing quantity attenuates with negative exponent. At same time, it presents calculating formula for gas gushing rate in working face and goaf. It concludes the quantity of gas gushing in slices outclass that in moveable mining. It pointed disadvantage factors is only that local gas will be over limit in moveable mining, gas gushing on slices working face mainly generates coal of down slice in goaf. The article emphasizes and demonstrates that moveable mining method in high seam has predominance of gas safety.