Abstract

Numerical modelling is widely used in the rock block displacement analysis because it has more capabilities than analytical-conventional methods. Numerical modelling is able to solve the case with a complex geometry, precise calculation more parameters and quick calculation time. The use of this method needs to be validated due to a mismatch between the conditions of the numerical model with actual conditions in the field. Numerical modelling is done by distinct element method and one of the numerical validation methods is physical modelling in a laboratory.

The geometry of the physical modelling in the laboratory using rock slope model with plane failure type as rock block object which will fail and using cement material. Physical modelling will be given load behind the slope using a pendulum as a seismic load with some variation of angles and be placing vibration test device (minimate III) above physical modelling to record the value of vibration due to a load of a given. Each test will be obtained the value of block displacement and vibration value. Based on this research, the results of numerical modelling approach value of displacement resulting from physical modelling test in the laboratory.

1. Introduction

Rock block displacement to be one of problem on rock mechanics and engineering. The analysis of rock block displacement are mainly related to many parameters, such as the geological structure, pore pressure, rock mechanical properties, seismic load, field stress, and other parameters. With the many parameters that are encountered, so it needs a calculation method that can calculate quickly and complex. The numerical method is one that can be used to solve this case because it would be very helpful to rock mechanic engineers in calculating and analyzing a rock block displacement or slope instability.

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