Abstract: In order to solve the problems about the large of gas emission quantity and the high of gas concentration in the upper corner in Huang Yanghui coal mine,arrange highly-located drainage roadway in 15109 coalface,through the method of theoretical analysis and numerical simulation to study the height range of "two belts".Research shows that the maximum height of caving zone about 15m,the height range of fissure zone about 15 to 60m.Analysis the gas concentration,drainage quantity in different vertical interval about highly-located drainage roadway and in return current about coalface,showing that when the vertical distance between highly-located drainage roadway and 15^# coal seam is 50 to 55m,gas drainage efficiency is about 83%,gas drainage concentration is about 42%,gas extraction pure quantity is about 60m³/min,gas concentration is reduced to 0.1% to 0.5% in return current,It has helped to safety and efficient production.