Research on microseismic localization algorithm with global search and local optimization

Yimin Song; Yazhou Zhao; Yuanyu Zhang; Wenliang Deng; Chuang Lu

doi:10.1016/j.heliyon.2023.e19251

Research on microseismic localization algorithm with global search and local optimization

Heliyon. 2023 Aug 18;9(9):e19251. doi: 10.1016/j.heliyon.2023.e19251. eCollection 2023 Sep.

Authors

Yimin Song¹, Yazhou Zhao¹, Yuanyu Zhang¹, Wenliang Deng¹, Chuang Lu²

Affiliations

¹ School of Civil Engineering, North China University of Technology, Beijing, 100144, China.
² Jilin Longjiapu Mining Co., Ltd, Jilin, 130000, China.

Abstract

A microseismic localization algorithm that combines global search and local optimization is proposed. The Fewer Conditions Trigger Difference (FCTD) objective function of global search and local optimization is constructed, the execution process of the algorithm is described by numerical simulation, and the global search and local optimization microseismic localization algorithm is verified and applied by field data analysis. The results show that: (1) the global search and local optimization methods have fast search speed in the global range, high convergence accuracy and stable localization results in the local range, and high localization accuracy and stability without relying on the velocity model and initial values in the process of search. (2) By comparing the localization results of different localization methods, the global search and local optimization algorithms have better localization results.

Keywords: Microseismic positioning; Pickup at first arrival time; Rock burst; Three-dimensional grid search.