a Graduate Aeronautical Laboratories and Department of Mechanical and Civil Engineering, Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA 91125, USA b NJU-ECE Institute for Underground Space and Geo-environment, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China, 210093 c Ecole Polytechnique Fédérale de Lausanne (EPFL), Sch...

Civil engineering projects have greatly benefited from the mechanical excavation of hard rock technology. Mining industry, on the other hand, is still searching for major breakthroughs to mechanize and then automate the winning of ore and drivage of access tunnels in its metalliferrous sector. The aim of this study is to extend the scope of drag bits for roadheaders in hard rock cutting. Variou...

of attempted suicides in Italy. Neuropsychobiology. 2000;41: 62–72. 5. Micciolo R, Williams P, Zimmermann-Tansella C, Tansella M. Geographical and urban-rural variation in the seasonality of suicide: some further evidence. J Affect Disord. 1991;21: 39–43. 6. Rock DJ, Greenberg DM, Hallmayer JF. Impact of case fatality on the seasonality of suicidal behaviour. Psychiatry Res. 2005;137: 21–7. L. ...

Abstract This research describes a quantitative, rapid, and low-cost methodology for debris flow susceptibility evaluation at the basin scale using open-access data geodatabases. The proposed approach can aid decision makers in land management territorial planning, by first screening areas with higher susceptibility. Five environmental predisposing factors, namely, bedrock lithology, fracture n...

The rock masses in a construction site of underground cavern are generally not continuous, due to the presence of discontinuities, such as bedding, joints, faults, and fractures. The performance of an underground cavern is principally ruled by the mechanical behaviors of the discontinuities in the vicinity of the cavern. During underground excavation, many surrounding rock failures have close r...

creep phenomenon in rock engineering plays a key role in development of underground spaces as they must be stable enough for a long period of time. current research involved designing and manufacturing of a new creep testing machine. the equipment is capable to perform simultaneous light-duty creep tests on more than one cylindrical rock samples at a very low cost.to evaluate the equipment’s pe...

the first step in mining activities is rock excavation in both mine development and production. constant pressure for cost reduction and creating an improved/safe work environment for personnel has naturally resulted in increased use of mechanical excavation systems in many mining operations. also, mechanical excavation and mining is more compatible with automation, meaning possibility of reduc...

Abstract KI-Engineering – translated as AI Systems Engineering aims at the development of a new engineering practice in intersection and Artificial Intelligence. Its goal is to professionalize use methods systems context. The article defines compares it with historical examples research disciplines that founded disciplines. It furthermore discusses long-term challenges where further needed whic...