Abstract:The time difference linear positioning algorithm mainly solves the algebraic method by constructing linear equations with reference to time difference, wave velocity and other parameters. The principle and calculation process are simple, but the disadvantage is that the equations may have no solution and the positioning calculation fails. The Geiger iterative localization algorithm performs multiple iterations on the basis of selecting the appropriate iteration initial value, and obtains the positioning result. It is more accurate than the time difference linear positioning algorithm in principle. In this paper, the linear positioning and Geiger iterative positioning algorithms in time difference positioning are used. The acoustic emission events monitored by the acoustic emission monitoring system of a large iron ore mine in Yunnan were analyzed. The error analysis of the positioning results obtained by the two positioning algorithms was used to specify the applicability and accuracy of the two methods for engineering practice.