Background: In this study are submitted the radon concentration measurement results of four underground mines: Stanterg, Artana, Hajvali and Badovc, which are owned by Trepça Enterprise, Kosovo. The mines have the same geological formation and from these mines are extracted ores rich with lead, zinc, silver, and gold. The radiation exposures caused by radon and radon daughters was determ...

Jury Christian GUIZARD, Directeur de recherche, Laboratoire de Synthèse et Fonctionnalisation des Céramiques, Saint-Gobain/CNRS Président du jury Rose-Noëlle VANNIER, Professeur, Ecole Nationale Supérieure de Chimie de Lille Rapporteur Fabrice MAUVY, Professeur, Université de Bordeaux Rapporteur Daria VLADIKOVA, Professeur, Bulgaria Academy of Sciences Examinateur Dominique JEULIN, Directeur de...

This paper describes two robotic systems developed for acquiring accurate volumetric maps of underground mines. One system is based on a cart instrumented by laser range finders, pushed through a mine by people. Another is a remotely controlled mobile robot equipped with laser range finders. To build consistent maps of large mines with many cycles, we describe an algorithm for estimating global...

Radon, together with its progeny, is present in high levels in some underground sites. Radon is known to increase the risk of lung cancer, while increased levels of radon decay products on the skin surface have been implicated in skin cancer induction and at sufficient levels might cause deterministic effects such as erythema. Although radon levels in working mines are controlled, radon in aban...

This paper deals with the issue of safety inside underground mines. The safety system designed based on wireless sensor network. The position of the different sensors inside underground mines is set by using analysis with ANSYS software. The safety system modeling in this paper is cost effective, energy saver , consistent, uninterrupted. This system performs automatic monitoring of different us...

In March last year Churchyard helped facilitate a pivotal petition appealing for urgent intervention to address TB on the mines to then national health minister Barbara Hogan and the Minister of Minerals and Energy Affairs, Buyelwa Sonjica. It was signed by the leading local and international TB control experts and led, he said, to the mining industry taking ‘great offence’. The health policy c...

Diglyphus isaea Walker (Hymenoptera: Eulophidae) is an important ectoparasitic wasp of many leaf miners. Ability of D. isaea to find hosts placed in artificial mines and for its larvae to pupate when the larva is not in a mine was studied. Artificial mines consisted of slits cut in index card sandwiched between two cover slips. Almost 80% of the neonate larvae of D. isaea located host larvae in...

for obtaining reservoir petrophysical properties, for example porosity, non-destructive methods such as x-ray computed tomography, ct, seems to be precise and accurate. porosity is deducted from the ct image with a single scan via different techniques, such as pore space detection by image segmentation techniques then correlation with porosity. more than one hundred samples with carbonate li...

Historically, the Everglades Agricultural Area (EAA) evolved under seasonally-flooded conditions that predominately supported sawgrass and other wetland vegetation. Over several thousand years, Histosol “muck” soils were deposited as organic matter accumulated above the limestone (calcium carbonate) bedrock. In the early 1900s, these soils were drained. Declining water table levels coupled with...