尾巷横川位置对U+L型综采面漏风的影响规律研究

In order to master the change rule of air leakage along fully mechanized working face and in tailing roadway with different tailing roadway location in goaf, it used a fully-mechanized face in Shanxi province as an example and established its mathematical model of air leakage in working face and gob. The air leakage along fully mechanized working face and the return air volume in tailing roadway were calculated on the distance between cross opening and working face is 0m, 20m, 40m or 60m, respectively. Numerical analysis and field test data shows that, with the increase of distance between tailing roadway and working face, the volume of air leakage along working face gradually increased, but the increment reduced; the volume of air leakage from wood supporting area in goaf and return air volume in tailing roadway reduced, and the decreasing amplitude is larger. For the U+L "two intakes and one return" ventilation type in working face, the area near down-corner angle is always the main air-leaking point from working face to goaf and the air leakage from wood crib timbering area to goaf is always the main source of return air volume in tail roadway.