Górnictwo i Geoinżynieria
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ISSN 1732-6702
Issue Date
2005
Volume
R. 29
Number
Nr 3/2
Description
Journal Volume
Górnictwo i Geoinżynieria
R. 29 (2005)
Projects
Pages
Articles
History of creation of the Mining Craft Faculty at the Katerynoslav Higher Technical Mining School (1900-1918)
(Wydawnictwa AGH, 2005) Bondarenko, Volodymyr I.; Kuzmenko, Olexandr M.; Dychkovskiy, Roman O.; Kovalevska, Iryna A.
The period of creation of leader faculty at National Mining University in Dnipropetrovsk (Ukraine) is considered. The basic scientific and methodological publications and researches are resulted. Situation in Ukraine mining in the beginning of 20th century are submitted.
Problems associated with closing underground mines for economic reasons
(Wydawnictwa AGH, 2005) Dvořaček, Jaroslav
This contribution deals with the economic development of underground coal mines in the last phase of their service life in conditions of the Ostrava part of the Ostrava-Karvina District. The question of alternative development of these mines from the economic point of view is presented here.
Tests of precipitation of sulphates from mining water
(Wydawnictwa AGH, 2005) Heviánková, Silvie; Vidlář, Jiří; Špaldon, Tomislav
The objective of these tests was to verify a methodology of desulphatation, which was developed at the Institute of Environmental Engineering, Faculty of Mining and Geology, Technical University Ostrava, separately for mining water with high concentration of sulphates and on the other hand for mining water with limited concentration of sulphates. The water samples used for these tests came from Smolnik and Zlate Hory.
Estimation of the range of fractured zone in the roof of underground roadways using the seismic method
(Wydawnictwa AGH, 2005) Jarosz, Jacek
It is a well-known truth that each mining activity changes the natural stress field in the rock mass. Driving of underground roadways leads to the appearance of a fractured zone around the excavated space. Separated and fractured roof rocks of underground roadways possess significant danger to the safety of people working in the mine. Knowledge of the thickness of the fractured zone is very important to the process of protecting roadways and particularly to determine conditions of roof bolting. A new way of use of a seismic method to estimate the parameters of fractured zones is described in this paper. The Love-type interference waves generated by hammer blows in roadway roof rock are discussed. The results of field measurements in a coal mine are presented.
Application of stabilizing highly thickened slurries for filling of flooded shafts
(Wydawnictwa AGH, 2005) Kleta, Henryk; Plewa, Franciszek; Strozik, Grzegorz
The paper presents the results of research on the use of highly thickened slurries for closure of abandoned shafts. Two fill slurry compositions were considered, i.e. mixtures of slag, fly ash, cement and water, one of them containing 15 and the other 30% of cement by mass. In the case of closure of a partially flooded shaft, the fill material or mixture of materials should possess the ability to solidify in a water environment, and after solidification must be proof against soaking and secondary liquefaction. The solidified fill material should also remain stable under the loads resulting from subsequent batches of fill material placed in the shaft. The laboratory test results and analyses showed that strength and strain parameters of the fill material depend not only on the composition of the mixture, but also on the way of transport (transport in stagnant water) and the curing environment - water or dry air environment. Numerical calculations of stress and strain state in the shaft plug performing the function of a revetment plug, conducted for increasing strengths of the fill material and increasing loads exerted on the plug by the thickening column of fill material poured in the shaft, allowed to determine the strength requirements and the technology of solidifying backfill utilized for shaft closures.