A STUDY OF UNDERGROUND TUNNEL STABILITY & ROCK MASS FAILURE CRITERION

Abstract

The assessment of tunnel stability is a critical topic, especially when it is necessary to construct through complex geological settings. In practice, surface surcharge loadings may arise when tunnels are dug beneath pre-existing buildings through fine-grained soil overlain by granular material Although the weights of the overlying coarse-grained materials are readily taken into consideration when analyzing tunnel stability. Since the founding of the International Society for contribution to tunnel stability in terms of strength and stiffness is frequently overlooked or too complex to quantify.

Rock Mechanics (ISRM) in 1962, one of the most active study topics in the engineering of rock structures has been rock failure. In rock mechanics and engineering, a rock failure criterion is critical for predicting the failure of rocks or rock masses.

The study of the stability and rock mass failure criterion briefly discuss the considerable point of making underground tunnel. A detailed discussion has been carried out  relevant theories and mathematical concepts which relate to tunnel stability and the failure criterion.

The literature review has found useful application especially in giving guidance on those areas needing further investigation. The author discusses mathematical theories in relation to the research undertaken. The major area of investigation has been done with the necessity of underground tunnel constructions focusing on after careful consideration.

The overall discussion has focused what influence mine tunnel failing criteria and essentiality of stability. Which helps to choose support type. In particular, the merits of standing support types such as square sets, steel arches and concrete linings are discussed in relation to the results of the research.

The thesis draws attention to the importance of study Stability and Rock mass failure criterion in tunneling aspect for a successful tunnel design.