Wyniki wyszukiwania - Biblioteka Nauki

1

Control and documentation studies of the impact of blasting on buildings in the surroundings of open pit mines

100%

Sołtys A. , Twardosz M. , Winzer J.

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tom Vol. 16, iss. 4

179--188

EN

Environmental Protection Law together with Geological and Mining Law impose on a mining plant a duty to protect its surroundings against the effects of mining operations. It also refers to the impact of vibrations on people and buildings induced by blasting works. Effective protection is possible only if the actual level of the impact is known, hence it has to be recorded. It was and still is the keynote idea of the research conducted at the AGH Laboratory of Blasting and Environmental Protection. The effect of many years of research is the development of an original and, in particular, an effective procedure to record the impact of blasting works with periodical measurements of vibration intensity or monitoring the vibrations' impact on buildings in the surrounding area. These assumptions form part of preventive actions taken by open pit mines, which are aimed at minimizing the impact of blast workings on the surroundings and are often recommended by experts. This article presents the course of action concerning control tests of vibration intensity in the surroundings of a mine. It also shows it is necessary to monitor vibrations in buildings as it is a source of knowledge for the mining plant management personnel and engineers who conduct blasting works, thus contributing to an increase in awareness of the responsible management of a mining plant. The Vibration Monitoring Station (KSMD) developed by a research group, after several upgrades, has become a fully automated system for monitoring and recording the impact of blast workings on the surroundings. Moreover, it should be emphasised that without the mine management personnel's cooperation, it would be impossible to work and achieve the common goal, i.e. conducting blasting works in a way that is safe for the surroundings.

2

Control of the vibration structure induced during works with the use of explosives

100%

Sołtys A. , Pyra J. , Twardosz M.

Technical Transactions

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2018

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tom Vol. 115, iss. 6

113--125

EN

This article presents the results of research on controlling the structure of vibrations induced during the firing of explosives with the use of non-electrical and electronic systems and the influence of the vibration structure during a transition from the ground to the building. The use of procedures associated with the selection of millisecond delay for firing explosive charges during blasting allows to get the excitation of favourable structure vibrations, thanks to a strong damping which is obtained at the transition from the ground to the structure. This means that optimally designed blasting works do not have to limit the mass of the explosives in the borehole as well as their number.

PL

W artykule przedstawiono wyniki badań nad sterowaniem strukturą drgań wzbudzanych w czasie odpalania ładunków MW z zastosowaniem systemów nieelektrycznych i elektronicznych oraz wpływem struktury drgań na interakcję układu budynek–podłoże. Zastosowanie do projektowania robót strzałowych procedur związanych z doborem opóźnienia milisekundowego do odpalania ładunków MW, pozwala na wzbudzanie drgań o korzystnej strukturze, dzięki czemu uzyskuje się silne tłumienie przy przejściu z podłoża do obiektów. Oznacza to, że optymalnie zaprojektowane roboty strzałowe nie muszą ograniczać masy ładunków MW w otworze oraz ich liczby.

3

Kompleksowa analiza fragmentacji usypu urobku

88%

Biessikirski A. , Dworzak M. , Pyra J. , Sołtys A. , Twardosz M.

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2015

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tom nr 8

25--33

PL

Pośrednie metody oceny fragmentacji urobku, wykorzystujące m.in. oprogramowanie komputerowe (np. Split Desktop 2.0.), znajdują coraz szersze zastosowanie przy ocenie efektów prowadzonych robót strzałowych. W artykule przedstawiono kompleksową ocenę fragmentacji urobku uzyskaną z wykorzystaniem wyników dodatkowych analiz przeprowadzonych w przekroju usypu. Ponadto, zaprezentowano wynik analizy kształtu oraz odrzucenia usypu, które uzyskano z wykorzystaniem modelu cyfrowego sporządzonego metodą SfM.

EN

Indirect methods of the output’s fragmentation evaluation e.g. the Split Desktop 2.0. software, are finding right now much more wide application in blasting works assessment. The complex method of the muck pile fragmentation assessment is being presented in the article. The assessment was performed according to the addition analysis in the muck’s pile cross-section According to the conducted research there were on average 3% more of the oversize rocks in the output. In the output’s cross-section there were more fines product – around 18%. Results of the muck pile shape and it’s throwback according to the SfM (Structure from Motion) modeling was included in the article. The SfM model has allowed to perform a detail evaluation of the output’s geometrical parameters such as: height, length etc. The digital model together with the on-site vision allowed to determine that the blasting parameter were chosen properly.