Effects of joint orientation in tunneling

This research is focused on the effects of joint orientation with respect to the direction of tunnel axis. It is expected that the stability of surrounding rock is affected by the strike and dip of the joints and the direction of the tunnel axis, whether it is with the dip or against dip etc. similarly the spacing of joints will also affect the stability. The orientation of joints in different directions can form blocks liable to fall. The objective of this research project is to determine the degree of influence of joints' strike and dip orientation in tunneling. Field works related to this project was carried out at the Bogala Graphite Lanka Ltd. Tunnel mapping and other observations related to the project were made at 489.6m level in Bogata mine. Models were made with joint spacing of 15mm with two joint sets (joint sets parallel to tunnel axis and joint sets perpendicular to tunnel axis). Tunnels were created with 90mm diameter with dip angles of joints are 00,300,600,and 900. The tunnels models are loaded using UCS machine and observed the behavior of rock mass around the tunnels during loading. From the results the most preferable dip angle for the joint strike perpendicular to the tunnel axis would be the 900 and for the joint strike parallel to the tunnel axis would be 00

Examining the influence of corporate governance on intellectual capital efficiency evidence from top service firms in Australia

The purpose of this paper is to examine the influence of corporate governance on intellectual capital (IC) in top service firms in Australia. Design/methodology/approach – Drawing on the agency theory, the paper develops hypotheses about relationships between corporate governance mechanisms (chief executive officer [CEO] duality, board size, board composition and subcommittee composition) and IC. The study uses a multiple regression analysis on data collected from corporate annual reports of 300 firm-year observations. Findings – The findings of the regression analysis indicate that CEO duality, board composition and remuneration committee composition are significantly associated with IC. In contrast, there is no evidence that board size and audit committee composition have an effect on IC. The study contributes to agency theory in general and the literature on IC and corporate governance more specifically. Practical implications – The findings of the study might be of interest to regulators, investment analysts, shareholders, company directors and managers in Australia, as well as academics, in designing corporate governance mechanisms to develop IC. Originality/value – Corporate governance is country-specific and, hence, its impact on managerial decisions leading to IC is different from country to country. This study provides empirical evidence on the relationship between corporate governance and IC in top service firms in Australia

Effects of joint orientation in tunneling

This research is focused on the effects of joint orientation with respect to the direction of tunnel axis. It is expected that the stability of surrounding rock is affected by the strike and dip of the joints and the direction of the tunnel axis, whether it is with the dip or against dip etc. similarly the spacing of joints will also affect the stability. The orientation of joints in different directions can form blocks liable to fall. The objective of this research project is to determine the degree of influence of joints' strike and dip orientation in tunneling. Field works related to this project was carried out at the Bogala Graphite Lanka Ltd. Tunnel mapping and other observations related to the project were made at 489.6m level in Bogata mine. Models were made with joint spacing of 15mm with two joint sets (joint sets parallel to tunnel axis and joint sets perpendicular to tunnel axis). Tunnels were created with 90mm diameter with dip angles of joints are 00,300,600,and 900. The tunnels models are loaded using UCS machine and observed the behavior of rock mass around the tunnels during loading. From the results the most preferable dip angle for the joint strike perpendicular to the tunnel axis would be the 900 and for the joint strike parallel to the tunnel axis would be 00