Finite element technique is used to model two phases of tunneling process, namely; excavation and rocklining interaction. The excavation phase is responsible for determining the pre-lining rock mass deformations and the reduced in-situ stresses. The interaction phase models the compatibility of the rock-lining system. The deformations and stresses of the rock-lining system and the final rock ma...

In this paper, a systematic approach is presented for optimal design of tunnel support lining using two-dimensional finite element analysis models of soil-structure interaction developed in ABAQUS software and the Modified Colliding Bodies Optimization (MCBO) algorithm implemented in MATLAB environment. This approach is then employed to study the influence of variable geometrical and geo-mechan...

in this paper, a systematic approach is presented for optimal design of tunnel support lining using two-dimensional finite element analysis models of soil-structure interaction developed in abaqus software and the modified colliding bodies optimization (mcbo) algorithm implemented in matlab environment. this approach is then employed to study the influence of variable geometrical and geo-mechan...

The utilization of the lining type in pressure tunnels is highly dependent on the geological and hydraulic conditions. There are two types of lining, namely concrete and steel lining but steel lining is one of the most expensive arrangements. To decrease the length of steel lining in these tunnels, the concrete lining, which prevents water seepage from the surrounding rock mass, is the appropri...

To prevent sympathetic detonation in a high performance magazine, barriers between stacks of munitions absorb donor fragments. Acceptor munitions may still initiate on impact of barrier debris or on being thrown into the walls of the magazine itself. These shocks can be reduced to a safe level by increasing the barrier's mass which reduces its velocity and the imparted shock. In addition a poro...

The paper considers the mechanical behaviour of a salt rock mass around mine shaft and analyses causes for differences in nature speed deformation relative to analog object. Assuming significant effect carnallite inclusions on physical properties rock, it is proposed combine rocks zones with into unified modelling medium. It justified by solving model problems based monitoring data. Adhering ap...