Abstract: The determination gob spontaneous combustion "three zones" is one of the fundamental work for fire prevention and control of mine working face. The correct division of gob "three zones" can provide reference for formulating corresponding fire prevention measures.Using Tongjialiang Mine existing beam tube system and optical fiber temperature test system, through layout of gas concentration and temperature measuring points in the two roadways of 8832 mechanized caving face, determination and distribution of gob spontaneous combustion "three zones" of the working face is measured accurately, and it also provides technical support for the gob fire prevention work in Tongjialiang Mine and Datong Mining area.