Abstract: Aiming at the fully mechanized mining face through the problem of erosion zones in large section, taking Bulianta coal mine 12520 fully mechanized mining face as an example, analyzed and summarized the detection method of erosion zones in the full mechanized mining face with large mining height, according to the method of determining through scouring zone of comprehensive mechanized mining face detection results and summarizes the key technology through scouring zone of comprehensive mechanized mining face, analyzed stratabehavior through scouring zone fully mechanized mining face, fully mechanized face similar geological conditions by providing a certain reference scouring zone.