Multiattribute prediction of terrain stability above underground mining operations

Underground Mining Transportation Systems

An Approach to Realizing Process Control for Underground Mining Operations of Mobile Machines

The excavation and production in underground mines are complicated processes which consist of many different operations. The process of underground mining is considerably constrained by the geometry and geology of the mine. The various mining operations are normally performed in series at each working face. The delay of a single operation will lead to a domino effect, thus delay the starting ti...

Analysis of Quartz Exposure Data Obtained from Underground and Surface Coal Mining Operations

been compiled and analyzed to characterize current occupational expo~urcs to quartz: to determine if the quartz percentages of samples collected for different occupations have changed during the period 1985 through 1992; and to study the intranline variability associated \'vid1 quartz sample percentages of selected occupations. Analysis of the occupational data shows that regardless of the type...

Modeling CO2 concentrations above sloping terrain

Modeling atmospheric CO2 concentration profiles and fluxes above sloping terrain at a boreal site T. Aalto, J. Hatakka, U. Karstens, M. Aurela, T. Thum, and A. Lohila Climate and Global Change Research, Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland Max Planck Institute for Biogeochemistry, P.O. Box 100164, 07701 Jena, Germany Received: 30 August 2005 – Accepted: 13 Sep...

Analytical Prediction of Stability Limit in Turning Operations

Unstable cutting due to chatter vibrations is one of the most important problems during metal cutting operations. Chatter can be a limitation for productivity and surface quality in turning operations, especially when long and slender tools and parts are involved. In this study, an analytical stability method for turning process is presented. The model takes the cutting geometry into considerat...