Ventilation is a vital component of an underground mining operation, used to guarantee a safe atmosphere for workers and survive them from the hazardous and toxic gases. In the recent years, engineers have begun to apply new operation research techniques in order to optimize the ventilation systems to assist in achieving a regulatory compliance, reduce ventilation costs, and improve its efficie...

Underground bauxite mining exploitation is a challenging environment for ventilation. In this paper, such complex underground ventilation network modeled in detail using the Ventsim software. The and its characteristics are selected developed through software, followed by their calibration validation against actual measurements of both airflow quantity quality which have been carried out at min...

W podziemnym górnictwie węgla wentylacja odgrywa ważną rolę, ponieważ zapewnia wystarczającą ilość świeżego powietrza dla pracowników i zmniejsza negatywne skutki uwalniania się szkodliwych gazów z pokładów oraz możliwość wystąpienia wybuchów. Ponadto, gdy eksploatacja sięga głębiej, zadanie wentylacji jest coraz ważniejsze. celu zagwarantowania dobrej wydajności do obliczeń sieci wentylacyjnej...

Heat generation in underground mines is a factor of extreme influence on the production, safety and comfort workers. This article aims to analyze heat sources an mine propose, as one alternatives improve ventilation conditions, replace diesel fleet with electric. The case study shows that this second source heat, being first autocompression, equipment third are fans. emitted by rock then stabil...

today radiology and imaging are the only and main method to generate geometrical data from body. 3d model of the body will give us the best and reliable information for better understanding and diagnostic. on the other hand with development of cad/cam and rapid prototyping, the 3d printers were born to build 3d models without considering the geometry. today the 3d printers are able to makes a 3...

conclusions our study demonstrated that 3d tvs has a good efficacy and reliable agreement with hysteroscopy in diagnosis of uterine lesions among infertile women. therefore, it can decrease the number of diagnostic hysteroscopies. results totally, 153 women were recruited in the investigation. patients aged 30.78 ± 4.79 years in average and the duration of infertility was 4.2 ± 2.91 years among...