During the process of coal seam mining, the overlying rock of the roof collapses and breaks, and the redistribution of surrounding rock stress can cause the development of mining induced fractures in the overlying rock of the roof, and form artificial collapse zones and water conducting fracture zones. The height of the "two zones" has a significant impact on coal seam mining, affecting mining operations, such as roof water inflow, ground subsidence and roof support. Taking the "two zones" height detection project in the 1305 working face of a certain coal mine as an example, the height of the "two zones" has been calculated and analyzed through empirical formulas, drilling measurements, and numerical simulations. It is showed that the height of the collapse zone in the 1305 working face could be 32.2 m, and the collapse mining ratio could be 4.29. The height of the developed water conducting fracture zone could be 94.4 m, and the fracture mining ratio could be 12.59. It will provide a detection method for obtaining the height of the "two zones" of coal seams in coal mines.