ANALYSIS OF FACTORS INFLUENCING ON RESISTIVE AND DIGGING FORCES OF EXCAVATORS IN SMALL-SECTION TUNNELS

Abstract

To discover the factors influencing on resistive and digging forces of excavators, we develop a mathematical model describing the interaction between excavator bucket and post-blast material in small-section tunnels. We analyze the partially resistive forces and total resistance acting on the excavator bucket in granular environment. Based on this, we select the key parameters to evaluate their influences to excavation resistance. The results show the effectiveness in design and manufacturing of the excavators working in constructional small-section tunnels.