Assessment of the subsidence ratio be based on seismic noise measurements in mining terrain

• Autorzy: Marcak Henryk , Pilecki Zenon

Identyfikatory

DOI

10.24425/ams.2019.126280

Warianty tytułu

PL

Wyznaczanie współczynnika osiadania be na podstawie pomiarów szumu sejsmicznego na terenie górniczym

• Języki publikacji: EN

Abstrakty

EN

Subsidence process in the rock mass disturbed by mining can be complicated and can be faster or slower depending on the geological structure and physical and mechanical properties of the rock mass, changes in exploitation geometry, and changes in the rate of exploitation. The most frequently, the sub-sidence process develops over years in a way that is difficult to observe over a short period (days). It has been proven in practice of coal mines in Poland that Knothe’s model describes subsidence process with high accuracy. It is based on treating the rock mass as a stochastic medium and describing subsidence with stochastic equations.It can be assumed that, the complicated stress field as a result of mining activities induce a series of displacements of different sizes in rock mass. The inelastic deformation in rock mass is accompanied by a microseismicity that can be recorded and processed. We assumed that seismic noise with weak seismic events is a low-energy part of the microseismicity. We proposed an analytical solution to examine the distribution of the energy of the seismic noise during subsidence process development based on Knothe’s model. In general a qualitative method of subsidence process assessment by the registration of the seismic noise was described.

PL

Proces osiadania w górotworze naruszonym działalnością górniczą może być skomplikowany. Może przebiegać szybciej lub wolniej w zależności od budowy geologicznej, fizycznych i mechanicznych właściwości górotworu, zmian w geometrii eksploatacji i zmian prędkości eksploatacji. Najczęściej proces osiadania rozwija się przez lata w sposób trudny do zaobserwowania w krótkim okresie (np. dni). W praktyce udowodniono, że w kopalniach węgla w Polsce model Knothego opisuje proces osiadania z dużą dokładnością. Opiera się on na traktowaniu górotworu jako ośrodka stochastycznego i opisuje osiadanie za pomocą równań stochastycznych. Można przypuszczać, że skomplikowane pole naprężeńwytworzone w wyniku działalności górniczej wywołuje w górotworze serię przemieszczeń o różnej wielkości. Niesprężystemu odkształceniu w górotworze towarzyszy mikrosejsmiczność, która może być rejestrowana. W badaniach przyjęliśmy założenie, że szum sejsmiczny wraz ze słabymi zjawiskami sejsmicznymi należy do niskoenergetycznej części sejsmiczności. Zaproponowaliśmy rozwiązanie analityczne, w celu zbadania rozkładu energii szumu sejsmicznego w czasie rozwoju procesu osiadania w oparciu o model Knothego. W efekcie zaproponowano jakościową metodę oceny procesu osiadania poprzez rejestrację szumu sejsmicznego.

Słowa kluczowe

EN

microseismicity; seismic noise; subsidence; Knothe's theory; subsidence ratio

PL

mikrosejsmiczność; szum sejsmiczny; osiadanie; teoria Knothego; współczynnik osiadania

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2019
• Tom: Vol. 64, no. 1
• Strony: 197--212
• Opis fizyczny: Bibliogr. 65 poz., tab., wykr.

Twórcy

autor

Marcak Henryk

• Mineral and Energy Economy Research Institute Polish Academy of Sciences, 7 Wybickiego Str., 31-261 Krakow, Poland

autor

Pilecki Zenon

• Mineral and Energy Economy Research Institute Polish Academy of Sciences, 7 Wybickiego Str., 31-261 Krakow, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)