Liquidated Sulphur Mine “Piaseczno” – Vol. 2. Application of Integrated Measurement Technologies in the Inventory of the “Piaseczno” Water Body – State of 2020

Among many inland water bodies, a large group includes water bodies formed as an effect of mining activities. Open-cast mining of common minerals, i.e., sand, gravel, loam, basic minerals such as lignite, sulphur and fossil resins of coniferous trees (amber) leaves many excavations, which spontaneously get filled with precipitation waters, black waters (the ones near the surface) and ground waters (deeper underground), often making new and wonderful elements of local landscape. Till the time of political transformations in Poland, due to low awareness of proper reclamation of post-mining areas, few post-mining excavations that spontaneously filled with water were subdued to comprehensive inventory, surveying and geological documentation, which is a necessary condition for their safe use. Examples of such objects are Bagry and Staw Płaszowski in Kraków (mining of loam (clay), sand and gravel), which have undergone full surveying inventory, including bathymetric surveying, only several decades after the end of mining (Gawałkiewicz R., Maciaszek J., 1999; Gawałkiewicz R., 2017; Gawałkiewicz R., 2018a and Gawałkiewicz R., 2018b), despite being the property of the city of Cracow for many years and functioning as sports and recreational, natural (ecological) and economical (fishing facilities) spots. A worth mentioning body of water is the reservoir “Piaseczno” (the commune of Łoniów, the Sandomierz District), now classified as a part of a group of reservoirs with medium retention and has been created after the opencast exploitation of sulphur ended. Despite many years of reclamation measures (shallowing by washing glass sands to the reservoir) and due to the great risk of danger (local landslides, unstable ground in the costal zones, artificially maintained level of the water table) the Łoniów commune did not approve this reservoir to use; and nowadays, the reservoir is not suitable for any form of use. The only function that can be fulfilled is ecological function. In the article the results of the complex geodetic (littoral zone) and hydrographic (body of water) inventory are presented. It was possible owing to the use of the remote-controlled HyDrone produced by Seeflor Systems and equipped with a SonarMite BTX/SPX OHMEX ultrasonic sonar by Lymtech and a GNSS set by Trimble (R8s antenna + TSC3 controller) and biological inventory in the littoral zone. Detailed morphometric parameters of the reservoir were also noted based on the integrated geodetic and bathymetric measurements, which in the future may provide valuable data used in the process of adapting the analyzed area for various socio-economical purposes, while maintaining a high degree of safety of its use. ZLIKWIDOWANA KOPALNIA SIARKI „PIASECZNO” – cz. 2. ZASTOSOWANIE ZINTEGROWANYCH TECHNOLOGII POMIAROWYCH W INWENTARYZACJI AKWENU „PIASECZNO” – STAN 2020 r. Spośród licznej grupy śródlądowych zbiorników wodnych dużą grupę stanowią obecnie akweny będące wynikiem działalności górniczej. Eksploatacja odkrywkowa kopalin pospolitych, tj.: piasków, żwirów, gliny, kopalin podstawowych, takich jak węgiel brunatny, surowców chemicznych, jak siarka, oraz kopalnych żywic drzew iglastych (bursztynu) pozostawia po sobie liczną wyrobiska, które z czasem wypełniają się samoistnie wodami opadowymi, zaskórnymi (przypowierzchniowymi) oraz gruntowymi (podziemnymi), tworząc często nowe i niezwykłe elementy lokalnego krajobrazu. Do czasu przemian ustrojowych w Polsce znikoma świadomość właściwej rekultywacji terenów pogórniczych decydowała o tym, iż niewiele wyrobisk poeksploatacyjnych samoistnie wypełnionych wodą doczekało się kompleksowej inwentaryzacji i udokumentowania mierniczo- geologicznego, co jest niezbędnym warunkiem bezpiecznego niegórniczego ich użytkowania. Przykładem takich obiektów wodnych są krakowskie Bagry i Staw Płaszowski (eksploatacja: gliny, piasku, żwiru), które doczekały się pełnej inwentaryzacji geodezyjnej, w tym batymetrycznej, dopiero kilkadziesiąt lat po zakończeniu eksploatacji surowców (Gawałkiewicz R., Maciaszek J., 1999; Gawałkiewicz R., 2017; Gawałkiewicz R., 2018a oraz Gawałkiewicz R., 2018b), mimo iż od wielu lat stanowią własność miasta Krakowa, pełniąc funkcje rekreacyjno-sportowe, przyrodnicze (użytki ekologiczne) oraz gospodarcze (obiekty wędkarskie). Wartym uwagi akwenem wodnym kwalifikowanym obecnie do grupy zbiorników średniej retencji, powstałym po eksploatacji odkrywkowej złóż siarki, jest zbiornik Piaseczno (gm. Łoniów, pow. sandomierski). Pomimo wielu lat rekultywacji (zabezpieczeń zboczy i ich wielokrotnego przemodelowywania, wypłycania poprzez namywanie piasków szklarskich do zbiornika), z uwagi na szereg niebezpieczeństw (lokalnych osuwisk, niestabilnego podłoża w strefach nadbrzeżnych, sztucznie utrzymywanego poziomu zwierciadła wody) nie został przekazany w użytkowanie gminie Łoniów i dziś poza funkcją użytku ekologicznego nie nadaje się do jakiejkolwiek innej formy zagospodarowania. W artykule przedstawiono wyniki kompleksowej inwentaryzacji geodezyjnej (strefa przybrzeżna) i hydrograficznej (akwen) przy wykorzystaniu zdalnie sterowanego hydrodrona HyDrone firmy Seefloor Systems wyposażonego w sondę ultradźwiękową SonarMite BTX/SPX OHMEX firmy Lymtech oraz zestaw GNSS firmy Trimble (antena R8s + kontroler TSC3) oraz inwentaryzacji przyrodniczej w strefie litoralu. Określono także szczegółowe parametry morfometryczne zbiornika na podstawie zintegrowanych pomiarów geodezyjnych oraz batymetrycznych, co w przyszłości może stanowić wartościowy materiał w procesie adaptacji analizowanego terenu do różnych społeczno- gospodarczych celów przy zachowaniu warunku wysokiego stopnia bezpieczeństwa jego użytkowania.

Current Status of Coal Mining and Some Highlights in the 2030 Development Plan of Coal Industry in Vietnam

Coal mining is one of the key mining industries in Vietnam. Coal is also an important fuel formany other industries. Currently, coal mining is mainly concentrated in Quang Ninh coal basin, theproportion of open-pit coal mining and underground mining is quite similar. However, according toDecision 403/QD-Ttg on approving the adjustment of the Vietnam coal industry development plan up to2020, considering the prospects by 2030, the mining output will be from 51 to 54 million tons by year2025 and from 55 to 57 million tons by 2030. In which, the proportion of underground coal mining willincrease gradually compared with that of open-cast mining, specifically, by 2030, the proportion of thelater compared to that of the former will be only 11%. According to this plan, open-pit coal mines havebeen shifting to underground mining technology, due to the increasingly deep conditions of coal seams.The following article will analyze the current status of coal mining in Vietnam and some highlights of thecoal industry development plan to 2030, in order to provide a general picture of Vietnam’s coal industryin the future.

Arcadia, The Museum Of Nature

<p>The loss of indigenous ancient forests has had a great impact to New Zealand habitats. Native birds, insects, fungi, plants and animals have been diminishing in diversity since human occupation. This is to a degree the result of intensive resource consumption and demand. Forestry, agriculture, mineral and gas resources were seen as more valuable than the ecosystems that existed before them. Our landscapes themselves became secondary. The particular infrastructure of open cast mining was chosen for this research. Mining represents a way to design active reclamation, while the mine site is still operating. Because of this, time becomes an integral component to the design process. The site is situated at Macraes flat, Otago. Ten kilometres of open cast mine, in operation since 1990. Open cast mining has produced great income. However, The cost of mining extends beyond an eyesore, it diminishes the quality of the land for any future use. Arcadia, the Museum of Nature is a vision of a place for preservation and for pride in ancestral property. A true “Arcadia” — a land of natural wonder. This is a museum of New Zealand’s key indigenous species. One designed through myth woven narratives, inspired by existing authors and generated through narrative experiments. To inspire, educate and showcase our unique ecologies, and endangered environments for future generations. Arcadia becomes a place to witness the succession of the natural world. A continuous time scale allows for a regenerative solution over years to centuries. Thereby showing the ability and resilience of nature in taking back from man’s intrusive tendencies. Rectifying the grotesque interruption of one of nature’s greatest tools, that of time. All the while harbouring our rare and unique wildlife. The museum of nature replaces the current system of remediation, and provides a more provocative solution to the end of modern day infrastructure.</p>

Arcadia, The Museum Of Nature

<p>The loss of indigenous ancient forests has had a great impact to New Zealand habitats. Native birds, insects, fungi, plants and animals have been diminishing in diversity since human occupation. This is to a degree the result of intensive resource consumption and demand. Forestry, agriculture, mineral and gas resources were seen as more valuable than the ecosystems that existed before them. Our landscapes themselves became secondary. The particular infrastructure of open cast mining was chosen for this research. Mining represents a way to design active reclamation, while the mine site is still operating. Because of this, time becomes an integral component to the design process. The site is situated at Macraes flat, Otago. Ten kilometres of open cast mine, in operation since 1990. Open cast mining has produced great income. However, The cost of mining extends beyond an eyesore, it diminishes the quality of the land for any future use. Arcadia, the Museum of Nature is a vision of a place for preservation and for pride in ancestral property. A true “Arcadia” — a land of natural wonder. This is a museum of New Zealand’s key indigenous species. One designed through myth woven narratives, inspired by existing authors and generated through narrative experiments. To inspire, educate and showcase our unique ecologies, and endangered environments for future generations. Arcadia becomes a place to witness the succession of the natural world. A continuous time scale allows for a regenerative solution over years to centuries. Thereby showing the ability and resilience of nature in taking back from man’s intrusive tendencies. Rectifying the grotesque interruption of one of nature’s greatest tools, that of time. All the while harbouring our rare and unique wildlife. The museum of nature replaces the current system of remediation, and provides a more provocative solution to the end of modern day infrastructure.</p>

Reliability Analysis of Dumpers through FMEA-TOPSIS Integration

Failure modes and effects analysis is an effective and most common traditional method to find and eradicate the failure modes in the system. In the FMEA method ranks are assigned based on risk priority number and are calculated by simply multiplying Severity(S), Occurrence(O), and Detection(D). FMEA doesn't consider subjectivity and vagueness in the decision-maker judgement and this method has been criticized due to its limitations. This project work aims to overcome the shortcomings of FMEA by integrating with the Multi-Criterion Decision Making (MCDM) model by Shannon Entropy weight method with Technique for Order of Preference by Similarity to Ideal Solutions (TOPSIS). The entropy method is used to calculate weights of the risk factors and TOPSIS is to examine the priority of ranking of failure modes or causes identified by the FMEA Study. In the Present work, FMEA and TOPSIS Hybridization method was performed to analyze potential failure modes of a group of dumpers in open cast mining at Singareni Collieries Company Limited (SCCL) in Ramagundam. The results obtained from this hybridization can be used to take the corrective actions in time so that the system reliability is improved.

Investigating The Effects of Rainy Season On Open Cast Mining Operation: The Case of Wescoal Khanyisa Colliery

The aim of this study was to investigate the impact of rainy season in open cast mining and possible factors that could contribute to production loses during these rainy periods. The major issue at Wescoal’s Khanyisa Colliery is the impact that rainfall has on the coal extraction process during the rainy season. The opencast mine operation loses a significant amount of time that is supposed to be used to run the mining value chain by trying to deal with the effects of the rainfall. This study made use of acquired data from Khanyisa Colliery between the period of December 2019 and January 2020 rainy months in South Africa. This data includes, the amount of daily and weekly rainfall, the water pumping rate, frequency of breakdowns and success rate of load and haul. The average weekly rainfall was found to be 69 mm over the 8 weeks of the summer season. However, the adopted method of managing the mine water was not efficient enough as a result of a low capacity pump and their pumping rate in comparison to the volume of water in the pit. This has affected some sections in the mine as productivity dropped due to reduction in loading and hauling activities from the pit to the stockpiles. In order to improve the productivity, the authors made some suggestions than can enhance production during rainy seasons.

Open-Pit Mine Dewatering Based on Water Recirculation—Case Study with Numerical Modelling

The layout of the dewatering system in open-cast mining must be adapted to mining assumptions and to the size of expected inflows, which, in turn, depend on natural conditions and the operation of other mines and groundwater intakes, affecting the arrangement of the hydrodynamic field. This case study analyses possible dewatering solutions related to a change in the mining drainage system: decommissioning by flooding of a depleted deposit and dewatering of a new one located in the vicinity. As part of numerical modelling, a solution was sought to minimise the environmental impact of drainage. Forecast calculations for two drainage alternatives were made. One of the solutions follows the classic approach: independent dewatering of the new excavation. The second solution assumes the recirculation of waters from dewatering of the new mine through their discharge into a closed and flooded pit located in the vicinity. The results of the forecasts for both variants point to the modification of the hydrodynamic field resulting from expected volumes of inflows and different environmental effects. The use of numerical simulations assisted the selection of the optimal dewatering solution.