Górnictwo i Geoinżynieria
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ISSN 1732-6702
Issue Date
2010
Volume
R. 34
Number
Nr 4
Description
Journal Volume
Górnictwo i Geoinżynieria
R. 34 (2010)
Projects
Pages
Articles
Badania laboratoryjne i półprzemysłowe rzeczywistych obciążeń elementów skrawających zębów WKL oraz nowej generacji zębów ACX-L
(Wydawnictwa AGH, 2010) Badura, Sławomir; Migacz, Katarzyna
In this paper it is presented the results of the laboratory and halfindustrial tests of WKL, ACXL, CX-25/38 teeth of knifes of the buckets for wheel excavators. Investigations were carried out on the samples, which physico-mechanical properties are approximate to the properties of the rocks dredged in KWB »Turów«. Analysis of static and dynamic investigations let to define optimal shape of tooth for working in very hard multiple conditions. Moreover there were presented three dimensional models of teeth by using FEM. For discrete it was applied solid elements tetra. Numerical analysis let to assignation distribution of stresses in different constructions of teeth and verification their constructions.
Badania nad możliwością zastosowania obrotowych zębów na nożach czerpaków koparek kołowych
(Wydawnictwa AGH, 2010) Badura, Sławomir; Migacz, Katarzyna; Micek, Piotr Andrzej
In this paper it is presented the results of the examination of new type rotating teeth of bucket of wheel excavators and analysis in comparison with actual used teeth. Investigations were carried out on each of knifes of bucket armed on the teeth and also with full armament of bucket's knifes of wheel for wheel excavator. It was investigated type of teeth WKL, R12.0M, CX-25/38. Comparison analysis let to optimal choice of definite type of teeth for working in very hard multiple conditions.
Pomiar prędkości detonacji MW w otworze strzałowym z zastosowaniem aparatury MicroTrap
(Wydawnictwa AGH, 2010) Batko, Paweł; Pyra, Józef
The article briefly discusses some factors affecting one of the most important parameters characterizing the explosives, namely the velocity of detonation. Also demonstrates how to measure the velocity of detonation of an explosive placed in the borehole, using the measuring apparatus MicroTrap.
Strategie i scenariusze perspektywicznego rozwoju produkcji energii elektrycznej z węgla brunatnego w świetle występujących uwarunkowań
(Wydawnictwa AGH, 2010) Bednarczyk, Jerzy; Nowak, Anna
Solutions accepted in world scenarios of energy development until 2030 have been presented in the paper and compared with the principles of »The Polish Energy Policy until 2030«. Indicators characterizing production of electric energy from coal in Poland in 2005-2009 and resulting synthetic relationships have been given. Strategic brown coal reserves in Legnica and Gubin region have been discussed and their main parameters have been compared. Development of coal processing technology and electric energy production has been indicated.
Znaczenie orientacji spękań skał macierzystych dla kształtu ziaren kruszywa
(Wydawnictwa AGH, 2010) Bromowicz, Jan; Figarska-Warchoł, Beata
The aspect (axial) ratios and dihedral angles were measured for a large number of particles of granite, basalt, sandstone and limestone aggregates, prepared in the same crusher. Joints orientation and intensity in the places of sampling were taken into consideration in analysis. It was found that content of irregular (flaky and elongated) aggregate grains is related to the intensity of joint sets observed in the quarry and to the rock structure (eg lamination) and texture (grain and crystal size and shape). Cuboidal grains are usually produced from a rock in which three main joint sets have similar frequency. Irregular grains are more frequent in finer fractions than in coarser ones. This apparently reflects stronger textural control of cracking of the rock when crushed. On the other hand, coarser grains are a result of cracking along joints. Furthermore, it has been proved that dihedral angles of aggregate particles and, therefore their shapes, depend on the shape of basic fracture cell created by the joint system in the rock.