A Construction of a Coal Trasportation System in an Open Pit Mine

Import 05/08/2014Tato bakalářská práce zpracovává téma rozvoj nové porubní fronty na hnědouhelném dole Doly nástup Tušimice – lokalita Libouš II - sever. Jejím cílem je stanovení vhodného směru porubní fronty a výstavba plošiny pro dálkovou pasovou dopravu. Práce je zaměřena na představení předmětné lokality - geologická charakteristika výhradního ložiska a popis zeměpisné polohy. Následuje seznámení s jednotlivými technologickými částmi dobývací metody a popis konkrétní použité dobývací metody pro těžbu uhlí na lomu Libouš DP Tušimice. Tato metoda je popsána v chronologickém postupu od původního stavu až po nové řešení výstavby uhelného odtahu. Realizace nového řešení bylo nutné pro zachování minimální roční těžby energetického uhlí a dodávek pro elektrárny Prunéřov I. a II., Tušimice I. a Chvaletice, kde roční spotřeba uhlí za všechny tyto odběratele dosahuje celkově až 11 mil. t uhlí.This bachelor work deals with the topic of development of new face line in the brown coal mine Doly nástup Tušimice – locality Libouš II - north. Its main aim is determination of suitable direction of new face line and building of long distance belt transporter deck. The work is aimed at the locality introduction – geological characteristics of exklusive deposit and geographical location. I tis followed by introduction of individual technological parts of mining methods and description of particular mining method used in the quarry Libouš DP Tušimice. This method is described in chronological order from the original status to the new solutions of coal withdrawal building . It was necessary to implement new solution to preserve minimal annual production of energetic coal and supplies for power plants Prunéřov I and II, Tušimice I. and Chvaletice, where the annual coal output for all these customers reaches 11 mil. tons of coal.Prezenční542 - Institut hornického inženýrství a bezpečnostivelmi dobř

Additional components allow more newly developed photosynthetic systems and car engines to outperform conventional ones under specific conditions.

<p>(a) Supercharged engines outperform conventional ICEs with increasing altitude (decreasing O₂ concentration). (b) Likewise, “supercharged” C4 crops (corn and sorghum combined data) outperform “conventional” C3 crops (soybeans (o) and wheat (x)) with decreasing CO₂ concentration. (c) Hybrid cars strongly outperform their traditional counterparts under conditions of high variability in driving speed, while they perform similarly under conditions of low variability. (d) In a similar fashion, CAM plants strongly outperform their C3 counterparts in conditions of high variability in vapor pressure deficit, while they are less efficient in the absence of variability.</p

A comparison of plant photosynthesis and car engine functioning illustrates how the core processes interact with the additional components.

<p>The core processes in each system are the Calvin cycle and the ICE (middle row). A concentrating mechanism in C4 plants and turbocharged cars provides concentrated CO₂ and oxygen, respectively, to the core cycle (upper row). A storage mechanism in CAM plants allows carbon dioxide to be stored as malic acid at night and then passed to the Calvin cycle during the day, while a storage mechanism in HEVs allows energy to be stored in the battery during braking and then passed to the motor to power the drivetrain in parallel with the engine (bottom row).</p

Comparative evolution of plants and cars.

<p>(a) In 1885, Karl Benz was among the automobile’s first producers, and in 1908, the Ford Motor Company pioneered the first mass produced automobile, the Model T [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref005" target="_blank">5</a>]. The turbocharger gained popularity during World War II, when it was used in military aircraft, which had to cope with low-pressure, high-altitude air [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref003" target="_blank">3</a>], and the first turbocharged passenger car, the Chevrolet Corvair Monza, debuted in 1962 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref010" target="_blank">10</a>]. Serious interest in hybrid technology arose in the 1960s when it was recognized as a means for harnessing variability in driving conditions to lower fuel use and emissions, and the Toyota Prius was introduced in 1997 as the first mass produced hybrid car [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref005" target="_blank">5</a>]. (b) The first C3 plants developed around 1 Ga ago as aquatic lifeforms [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref006" target="_blank">6</a>]. CAM photosynthesis evolved during the Paleozoic era and likely experienced a significant expansion in terrestrial plants in the Cenozoic era, which was accompanied by increasing seasonality of water availability [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref004" target="_blank">4</a>]. C4 photosynthesis is thought to have first evolved in the mid-Tertiary period and experienced a large increase in the late Miocene, 4-7 Ma, which brought decreasing CO₂ levels [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198044#pone.0198044.ref004" target="_blank">4</a>].</p