Górnictwo i Geoinżynieria
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ISSN 1732-6702
Issue Date
2011
Volume
R. 35
Number
Nr 4
Description
Journal Volume
Górnictwo i Geoinżynieria
R. 35 (2011)
Projects
Pages
Articles
Chłodzenie powietrza w wyrobiskach chłodziarką sprężarkową o działaniu bezpośrednim
(Wydawnictwa AGH, 2011) Branny, Marian; Filek, Krzysztof; Swolkień, Justyna
Problem of air-cooling in blind headings with duct, exhausting systems of ventilation is considered. Performance of two types of compression refrigerators were tested. Calculations were made for different volume flows of air through evaporator and for different air temperatures in heading. Parameters of cooled air and cooling power of evaporators were calculated using mathematical model of compression refrigerator developed in [1]. The results of calculations are presented in the form of plots and tables. Cooling power of evaporators and its division on sensible and latent part was shown on diagrams.
Zmiany energetyczne związane z rozwojem uszkodzenia i dyssypacją plastyczną w teście jednoosiowego i trójosiowego ściskania próbek piaskowca
(Wydawnictwa AGH, 2011) Cieślik, Jerzy
Results of laboratory investigations focusing on energy changes with damage and plastic dissipation process under a uniaxial and triaxial compression tests of sandstone samples has been presented in this paper. It was assumed, that fracture propagation and plastic dissipation caused by compression of rock samples follows by coupled damage and plasticity mechanical model. Based on this model and the principle of conservation of energy, damage and the plastic dissipation energies was determined separately.
Stateczność zboczy drugiej kwatery składowiska odpadów komunalnych w Chełmku
(Wydawnictwa AGH, 2011) Cholewa, Mariusz; Mankiewicz, Beata
The paper presents an analysis of the cohesion values of municipal wastes from the damping ground in Chełmek in the context of its influence on the obtained values of the safety factor determined using Fellenius method. While preparing data for calculations, existing documentation concerning the dumping ground was used and for the full recognising the analysed quarter, in-situ tests were performed. The obtained data made it possible to carry out the theoretical calculations showing the possibility of the loss of the stability in the case of occurring certain determined values of geotechnical parameters and soil-water conditions.
Doszczelnienie zlikwidowanego szybu Górsko w Kopalni Soli »Wieliczka«
(Wydawnictwa AGH, 2011) d'Obyrn, Kajetan; Kokot, Bogdan; Kucharz, Jan
This paper presents technical solutions related to the sealing of the liquidated Gorsko Shaft in the Wieliczka Salt Mine. Due to the identified spills in the surroundings of the shaft at different levels of the mine, sealing is necessary in the upper part of the shaft from the surface to the boundary between the tertiary and quaternary layers. The goals of sealing cementation of the Górsko Shaft is: I) to eliminate surface water inflow leaching salt deposits into surroundings of the shaft, II) obtain a concrete coat around the Gorsko Shaft tube, and III) consolidate rock massif to ensure stability of the salt rock formation.
Kształtowanie ryzyka zawodowego związanego z hałasem na stanowiskach pracy w podziemnych wyrobiskach eksploatacyjnych
(Wydawnictwa AGH, 2011) Kapusta, Mariusz; Szponder, Tadeusz
The article presents the results of the noise measurement at selected workplaces in coal mines. The employer is obliged to identify, evaluate and estimate occupational risk, resulting from existing hazards. To analyze the exposure of workers to noise, a group of mining division employees was selected. The main source of noise in excavations comes from machines and technological processes associated with mining of the body of coal. Risk assessment was carried out with use of the PN-N-18002 norm, which enabled to estimate the size and the degree of risk acceptability, while allowed to determine prevention methods. In addition, the article compares actual and tabulated values of noise for various mining machinery.