Release Time:2022-06-26  Hits:

Date of Publication: 2010-01-01

Journal: 煤炭学报

Volume: 35

Issue: 4

Page Number: 575-579

ISSN: 0253-9993

Abstract: To establish earth pressure control model aiming at chamber pressure
   balance, a method of combining mechanism analysis and least squares
   support vector machine ( LS-SVM) technology was proposed. Firstly, the
   tunneling process mechanism of earth pressure balance (EPB) shield was
   analyzed, and an earth pressure control model of pressure chamber was
   established based on continuity equation, mechanics balance equation and
   so on. For the total thrust of shield, speeds of shield jack and screw
   conveyor influencing to the chamber earth pressure were quitely
   different, a weighting coefficient y was introduced. Secondly, an error
   model from sampling data was established for obtaining optimal y by
   means of LS-SVM. Finally, the simulations were given to illustrate the
   effectiveness of the earth pressure control model

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