| In recent years,tunnel construction in the fields of transportation,hydropower and other fields has developed rapidly.Due to the extremely complicated geological conditions,disasters such as water inrush during the construction process frequently occur,causing huge economic losses,seriously threatening the safety of people's lives and property,and urgently need to solve the bottleneck of safety monitoring technology for underground projects such as tunnels.The microseismic monitoring technology can estimate the stability of the rock mass by using the microseismic signals generated during the rock rupture process in the tunnel,which is of great significance for ensuring construction safety.Microseismic localization is the core of microseismic monitoring technology.It is of great safety and economic significance to carry out microseismic precise localization technology research.In this paper,aiming at realizing high precision localization technology of microseismic source,a joint localization algorithm based on combination of source scanning algorithm and simplex algorithm is proposed.Combined with the localization algorithm,a fully functional microseismic localization software system was developed.and the above algorithms and systems were validated.The main research results are summarized as follows:1.The most important thing is that this paper applies a joint localization algorithm based on the combination of source scanning algorithm and simplex algorithm.The algorithm is to input the result of source scanning algorithm(SSA)as the initial iterative input of simplex algorithm,which improves the localization accuracy.Compared with the traditional simplex algorithm,the joint localization algorithm proposed in this paper redues the influence of initial value on the location result and improves the global search ability.Compared with the traditional source scanning algorithm,the joint localization algorithm proposed in this paper reduces the influence of the source energy(energy level)on the localization result and improves the ability of anti-noise interference.In this paper,the localization accuracy is improved from the time-frequency analysis of the original signal of the microseismic and the denoising and the timely extraction of the effective signal of the microseismic.2.Based on the joint localization algorithm proposed in this paper,a microseismic localization software system is developed.Firstly:the development requirements and overall architecture of the system are introduced.Then,the implementation principles and functions of the main modules of the software are analyzed in detail.Finally,the functions of localization parameter configuration,first arrival picking of the microseismic signal,microseismic source localization,history query,data saving and export are realized.The system successfully passed the functional test.From the test results,all the main modules satisfy the application requirements well,and the running state is good,which lays a foundation for the analysis and processing of the subsequent microseismic signals.3.The joint localization algorithm and the developed software system proposed in this paper are verified by simulation and verification experiments.By analyzing the MATLAB localization results and the software system localization results,the localization error of the joint localization algorithm is smaller than that of the simplex algorithm and the source scanning algorithm,which verifies the localization accuracy of the joint localization algorithm proposed in this paper is higher. |
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