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Analiza czynników decydujących o efektywności drążenia wysokowydajnych przodków chodnikowych osiągających postęp powyżej: 400, 500, 600 m/miesiąc

Salamon Krystian, Zmarzły Marian, Mazurek Wojciech

Przegląd Górniczy

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2022

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T. 78, nr 2

18--25

PL

Zmieniające się realia społeczno-ekonomiczne wymuszają ciągłą restrukturyzację górnictwa węglowego, która w chwili obecnej wymaga poprawy konkurencyjności polskiego węgla. Każdy zakład górniczy posiadający perspektywiczne zasoby kopaliny skupia się na zmianach mających na celu poprawę efektywności wydobycia, zwiększenie wydajności, poprawę bezpieczeństwa pracy i optymalizację zatrudnienia. Schodzenie z głębokością prowadzenia robót w aktualnie eksploatowanych pokładach wiąże się z koniecznością drążenia wyrobisk w coraz trudniejszych warunkach górniczo-geologicznych. Uwarunkowania zalegania złoża OG Jastrzębie Górne I (Ruch Zofiówka) są jednym z najlepszych przykładów prowadzenia robót w pogarszających się realiach górniczej eksploatacji (w tym ze wzrostem zagrożeń naturalnych), niemniej nie stanęło to na przeszkodzie uzyskania w ostatnich latach postępów przodków należących do jednych z najwyższych, nie tylko w JSW SA, ale i w całym GZW. Postępy przodków: chodnika nadścianowego G-6 w pokładzie 416/3 (513 m), czy chodnika nadścianowego F-1 w pokładzie 407 2/3 (619 m) świadczą o możliwości wysokiej efektywności. W artykule zaprezentowano zestawienie warunków górniczo-geologicznych oraz rozwiązań techniczno-organizacyjnych, które pozwoliły na osiągnięcie takich wyników.

EN

The changing social and economic realities forces continuous restructuring of the coal mining industry, which requires improving the competitiveness of Polish coal. Any hard coal mine with prospective resources is focused on restructuring to improve mining efficiency, increase productivity, improve occupational safety and optimize employment. Increasing the mining depth is connected with the necessity to drill underground excavations in increasingly difficult mining and geological conditions. The conditions of the currently excavated deposit in the Jastrzębie Górne I (Zofiówka Site) mining district are one of the best examples of conducting works in the deteriorating realities of mining exploitation (including an increase in natural hazards), however, it did not prevent the achievement in recent years of the progress of the roadhead (the face of a roadway) drilling being one of the highest, not only in JSW SA, but also in the entire Upper Silesian coal basin. The progress of the roadhead: Tailgate G-6 in 416/3 coal seam (513 m) and Tailgate F-1 in 407 2/3 coal seam (619 m) provide that high efficiency is possible. The paper presents a summary of the mining and geological conditions and the technical and organizational solutions that made it possible to achieve such results.

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Monitoring wychylenia wieży szybowej Szybu II w KWK „Borynia-Zofiówka” Ruch „Borynia”

Lubosik Zbigniew, Skowronek Tomasz, Zmarzły Marian

Przegląd Górniczy

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2020

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T. 76, nr 11-12

16--23

PL

W artykule przedstawiono wybrane wyniki monitoringu wychyleń wieży Szybu II KWK „Borynia-Zofiówka” Ruch „Borynia”. Monitoring realizowany był z wykorzystaniem opracowanego w Głównym Instytucie Górnictwa systemu monitoringu drgań i wychyleń opartego na laserowym czujniku drgań i wychyleń. Zaprezentowano wychylenia zarejestrowane w lipcu 2020 r. za pomocą czujników umieszczonych na wysokości kół linowych oraz na wysokości zastrzału Szybu II. Wychylenie mierzono w kierunkach E-W i N-S. Dokonano analizy wyników monitoringu wychyleń oraz wpływu temperatury na ich wartość.

EN

The paper presents selected results of monitoring of inclination of Shaft II of Coal Mine “Borynia-Zofiówka” Plant “Borynia”. The monitoring was conducted by means of vibration and inclination monitoring system developed at Central Mining Institute which is based on the laser vibration and inclination sensor. The inclination results recorded in July 2020 by sensors placed at the height of the rope pulleys and on the strut were presented. The inclination was measured in E-W and N-S directions. The analyses of the inclination monitoring results and the influence of the temperature on its value were also performed.

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Study of the Accuracy of Methane Concentration Forecasts in the Area of Longwall Outlet B-3 in Seam 407/1 in KWK “Borynia-Zofiówka” Ruch Zofiówka

Badura Henryk, Zmarzły Marian, Trzaskalik Paweł, Korshunov Aleksandr Ivanovich

New Trends in Production Engineering

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2020

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Vol. 3, Iss. 1

120--130

EN

In the presented publication, an ex post forecast of methane concentration at the airway outlet was carried out on the basis of equations previously developed and repeatedly tested by H. Badura and its errors were calculated. This forecast was considered as a reference level. Next, using the same forecast equations, the forecasting of methane concentration at the sensor location up to 10 m in front of the longwall face and at the longwall outlet was carried out, followed by the analysis of forecast errors. Since the measurement of methane concentrations in the locations under consideration differed, the results of forecasts also differed. Therefore, in order to assess the accuracy of forecasts, their absolute and relative errors were calculated and then compared with the forecast errors at the airway outlet. The analysis of errors showed that there are differences in forecast accuracy and it is advisable to develop new forecast equations mainly for the longwall outlet, but also for the location of methane concentration sensor installed in the airway up to 10 m in front of the longwall.

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Analysis of Gas-Geodynamic Phenomena During the Preparatory and Mining Works in Seam 358/1 at KWK “Budryk”

Zmarzły Marian, Schubert Michał, Salamon Krystian

New Trends in Production Engineering

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2020

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Vol. 3, Iss. 1

131--148

EN

The nature of gas-geodynamic phenomena is so complicated and unpredictable that it forces the necessity of continuous search for new principles of identifying the outburst threat and ongoing monitoring of this threat with view of current conditions in the mine. After the incidents in JSW S.A, the mines carrying out works in seams threatened with outbursts, upon their own initiative introduced additional rigours and increased the frequency of measurements and tests regardless of the existing legal requirements. Incidents that have taken place in KWK “Budryk” in recent years show how important is continuous verification of knowledge related to the forecasting of the outburst threat on the basis of ongoing observations of works. The local occurrence of a zone characterized by high methane-bearing capacity in the coal seam, even after taking preventive measures and introducing additional rigorous did not allow for the complete elimination of gas-geodynamic phenomena and avoidance of danger to employed people.

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Comparative analysis of methane concentration near the junction of the longwall and top road

Zmarzły Marian, Trzaskalik Paweł

Management Systems in Production Engineering

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2019

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nr 3 (27)

166--173

EN

Mining of longwalls ventilated by the „U” method is willingly applied in Polish coal-mines due to low costs of workings maintenance, low costs of ventilation and a lower fire threat because of a limited flow of air through goafs. However, such a way of ventilation may pose an increased risk of methane explosion. For this reason, the “U” ventilation has been limited in longwalls with methane risk. The mining regulations in force provide that ventilation methane-bearing capacity, i.e. the intensity of methane flow into the ventilation air cannot exceed 20 m3 CH4/min. The regulations also provide that in the event the absolute methane-bearing capacity, i.e. a sum of methane released to the ventilation air and captured by the methane drainage system is higher than 25 m3 CH4/min and the “U” method of ventilation is applied, the effectiveness of methane drainage should be minimum 50% in relation to the forecast absolute methane-bearing capacity. To streamline the process of ventilation near the junction of the longwall and the gallery carrying off the used air, auxiliary ventilation means are applied, such as a ventilation partition, a ventube – which supplies air without methane or with a low concentration of methane, injectors etc. Application of these means is limited by the cross-section of the heading carrying off the air from the longwall. Deformations of the ventilating roadway, which is usually located in the one-sided vicinity of goafs, may prevent the use of a ventilation partition, which has a negative influence on the conditions of ventilating the junction of the longwall and ventilating roadway. The author of the article also refers to such conditions, presenting average values and maximum concentrations of methane concentrations recorded with four methane concentration sensors, located in the vicinity of the junction of the longwall and ventilating roadway.