China Safety Science Journal ›› 2023, Vol. 33 ›› Issue (6): 64-72.doi: 10.16265/j.cnki.issn1003-3033.2023.06.0337

• Safety engineering technology • Previous Articles     Next Articles

Prediction of vibration velocity of deep blasting based on transfer learning

ZHANG Xiliang1,2,3(), JIAO Haokai2, LI Erbao1,2   

  1. 1 Maanshan Institute of Mining Research Blasting Engineering, Maanshan Anhui 243000, China
    2 State Key Laboratory of Safety and Health for Metal Mines, Maanshan Anhui 243000, China
    3 Sinosteel Maanshan Mine Research Institute Co., Ltd., Maanshan Anhui 243000, China
  • Received:2023-02-21 Revised:2023-05-15 Online:2023-08-07 Published:2023-12-28

Abstract:

In order to better predict the blasting vibration velocity of deep mines, aiming at the problems of small sample size and different data distribution in the prediction of blasting vibration velocity of deep mines, the useful knowledge in the blasting data of shallow underground mines was transferred to the prediction model of blasting vibration velocity of deep mines, and an LR-TrAdaboost (transfer learning) algorithm was proposed to improve the sample size and prediction accuracy of the model. Taking the prediction of deep blasting vibration velocity of a copper mine as the research object, combined with 27 deep blasting data of the copper mine and 204 shallow blasting data of five underground metal mines such as Meishan Mine, SVR, TrAdaboost-R2 and LR-TrAdaboost algorithms were used for prediction and comparison respectively. The model scores of the three algorithms are 0.24, 0.38 and 0.81, and the root mean square error(RMSE) is 0.152, 0.107 and 0.06, respectively. Compared with SVR and TrAdaboost-R2, the prediction error of the LR-TrAdaboost algorithm reduces by 60.5% and 43.9%, respectively. At the same time, LR-TrAdaboost converged when the number of iterations is 50, while TrAdaboost-R2 converged after the number of iterations is 100, and the convergence rate is twice that of the latter. Research shows that the LR-TrAdaboost algorithm has better prediction performance.

Key words: vibration velocity of deep blasting, prediction error, support vector regression(SVR), machine learning