USING A DISCRETE EVENT SIMULATION TOOL TO PREDICT THE SPEED OF SMALL CROSS SECTION TUNNELING BY DRILLING AND BLASTING METHOD

Abstract

Compared to medium- and large-sized underground tunnels, construction of small cross section tunnels has different conditions: in terms of construction organization space, vehicles and workers especially transportation in narrow roads that only one vehicle is allowed to pass. This article studies the small cross section tunneling construction in rocks with different coefficients of consolidation (fkp) and predicts the tunneling construction speed for the narrow segment by using EZStrobe software to simulate. The results are compared with the baseline model in case without narrow segmentation, and also indicate a reasonable number of transport vehicles should be used.