ZOOLOGICAL ASPECTS OF THE ECOLOGICAL SUCCESSION ON THE PLAIN DUMP OF THE NAZAROVO LIGNITE OPEN-CAST MINE IN KRASNOYARSK KRAI

2019 ◽  
Keyword(s):  
Ecological Succession ◽  
Krasnoyarsk Krai ◽  
Open Cast Mine ◽  
Open Cast

scholarly journals Improving the efficiency of conveyor transport with the use of network technologies

2019 ◽  
Vol 140 ◽  
pp. 04011
Author(s):  
Margarita Kovalchuk ◽  
Dmitriy Poddubniy
Keyword(s):  
Optimal Solution ◽  
Motor Vehicles ◽  
Automation System ◽  
Economic Costs ◽  
The World ◽  
Large Length ◽  
Open Cast Mine ◽  
World Industry ◽  
Network Technologies ◽  
Open Cast

Nowadays there is a tendency in the world industry to increase the number of open cast mines and the depth of work performed in them. In this regard, the problems of reliable and environmentally friendly transportation of extracted resources become especially urgent. Traditional motor vehicles is quite expensive, have problems with reliability and leads to a large gas pollution of the atmosphere, as well as the associated necessary stoppages of the open cast mine, which in turn leads to significant economic costs. The most optimal solution to these problems is the use of long conveyor lines for transportation. However, it is necessary to solve a number of problems one of them is related to the efficiency of the conveyor, which has a large length. This system needs to be controlled and monitored in real time. Thus, it is necessary to implement an automation system that meets all the specified requirements.

Sedimentology of the Early Jurassic terrestrial Steierdorf Formation in Anina, Colonia Cehă Quarry, South Carpathians, Romania

2013 ◽  
Vol 63 (2) ◽  
pp. 175-199 ◽  
Author(s):  
Artur Kędzior ◽  
Mihai E. Popa
Keyword(s):  
Source Area ◽  
Sedimentary Facies ◽  
Early Jurassic ◽  
Alluvial Fans ◽  
Upward Trend ◽  
Meandering River ◽  
Facies Associations ◽  
Depositional Systems ◽  
Open Cast Mine ◽  
Open Cast

Abstract Kędzior, A. and Popa, E.M. 2013. Sedimentology of the Early Jurassic terrestrial Steierdorf Formation in Anina, Colonia Cehă Quarry, South Carpathians, Romania. Acta Geologica Polonica, 63 (2), 175-199. Warszawa. The continental, coal bearing Steierdorf Formation, Hettangian - Sinemurian in age, is included in the Mesozoic cover of the Reşiţa Basin, Getic Nappe, South Carpathians, Romania. The Steierdorf Formation can be studied in Anina, a coal mining center and an exceptional locality for Early Jurassic flora and fauna, occurring in the middle of the Reşiţa Basin. This paper presents the results of sedimentological, stratigraphical and paleobotanical researches undertaken in Colonia Cehă open cast mine in Anina, where the Steierdorf Formation outcrops widely. Several sedimentary facies associations have been described, these associations permitting the reconstruction of various depositional systems such as alluvial fans, braided and meandering river systems, as well as lacustrine and coal generating marsh systems of the Steierdorf Formation. The sedimentary associations recorded within the Steierdorf Formation show a gradual fining upward trend, pointing to a rising marine water table and a decreasing relief within the source area.

Multicaterpillar Track Chassis of Big Machines - Identification of Loads

2011 ◽  
Vol 490 ◽  
pp. 187-194 ◽  
Author(s):  
Tadeusz Smolnicki ◽  
Paweł Maślak
Keyword(s):  
Center Of Gravity ◽  
Strain Gauges ◽  
Caterpillar Track ◽  
Open Cast Mine ◽  
Open Cast

Multicaterpillar track chassis are used in the biggest machines. This kind of chassis is commonly used in open cast mines for mobile transfer conveyor or for bucket wheel excavators. In each machine the chassis consist of 6 to 12 caterpillar tracks, which some are steered. Existing models used for analytical calculations are based on simplified relations taken from quasistatic equations of stability and geometrical connections. The complex research was conducted on mobile transfer conveyor, which is used in open cast mine. The aim of measurements was to identify the value of force that acts on elements of chassis during the steering and driving the machine. The measurements were taken during the drive in different directions, with different positions of center of gravity. The strain gauges were used to measure the deformation on each caterpillar track, trusses and drawbar.

Soil structural development in a rehabilitated open-cast mine site in south-east Australia

2021 ◽  
Author(s):  
Tiia Haberstok ◽  
Evelin Pihlap ◽  
Franziska Bucka ◽  
Tabea Klör ◽  
Thomas Baumgartl ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Properties ◽  
Bulk Density ◽  
Soil Structure ◽  
Aggregate Size ◽  
Size Class ◽  
Mine Site ◽  
Open Cast Mine ◽  
Open Cast

<p>Rehabilitated soils from post mining fields are considered to have poor soil structure, low nutrient content and microbial activity. Soil development during rehabilitation is a complex biogeochemical process influenced by the inherent properties of the substrate used for the rehabilitation. Besides disturbed soil properties, in Australia soil rehabilitation success is also influenced by climatic conditions like high evaporation rate which affects rebuilding of soil system functions. There are several studies looking into the development of soil properties post rehabilitation in temperate climates, however, the intertwined development of soil structure, quality and quantity of soil organic matter (SOM) after the rehabilitation under water stressed environment is not clear until now.</p><p>In this study, we used a space-for-time chronosequence approach in the rehabilitated open-cast mine site at Yallourn (Victoria, Australia) to elucidate the development of soil structure and soil organic matter after rehabilitation. We selected five different fields with increasing rehabilitation ages (2, 3, 10, 21 and 39 years) and two mature soils that are used as grazing land. In each field, we sampled 6 independent locations with stainless steel cylinders (100 cm<sup>3</sup>) at two depths of 0-4 cm and 10-14 cm.  All samples were analysed for bulk density, organic carbon (OC) and total nitrogen (TN) concentration. Selected samples were wet sieved into four aggregate size classes of <63 µm, 63-200 µm, 200-630 µm and >630 µm. Each aggregate size class was characterized by OC and TN concentration. The chemical composition of the SOM of selected samples was characterized using solid-state <sup>13</sup>C NMR spectroscopy.</p><p>The studied soils have a strong temporal dynamic and variability as determined for the soil properties bulk density and SOM stocks. Aggregate fractionation showed that large macroaggregates (>630 µm) were the most abundant size class fractions in each rehabilitation field, representing 95-75% of the total soil mass. SOM played an important role in the formation of large macroaggregates, where the highest contribution to total OC content was observed. It became evident that plant derived carbon had a decisive role in the structural formation, because O/N-alkyl-C and alkyl-C chemical shift regions represented the highest relative intensities throughout the chronosequence.</p>

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