Thekla shaft
| Thekla shaft | |||
|---|---|---|---|
| General information about the mine | |||
 |
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| Information about the mining company | |||
| Start of operation | 1905 | ||
| End of operation | 1930 | ||
| Funded raw materials | |||
| Degradation of | |||
| Greatest depth | 242 m | ||
| Geographical location | |||
| Coordinates | 51 ° 48 '2.4 " N , 10 ° 19' 41.9" E | ||
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| Location | Clausthal-Zellerfeld | ||
| local community | Clausthal-Zellerfeld | ||
| District ( NUTS3 ) | Goslar | ||
| country | State of Lower Saxony | ||
| Country | Germany | ||
| District | Clausthal mining inspection | ||
The Thekla-Schacht (also Thekla-Blindschacht or Rosenhöfer Blindschacht ) was an underground and at the same time deepest mining shaft on the Rosenhöfer corridor train near Clausthal-Zellerfeld .
history
In the middle of the 19th century, it was recognized that the old, ton-length shafts of the Upper Harz mining industry should be replaced with new, deeper shafts. The conversation of the old shafts had now become very expensive, especially since the progress in ever greater depths complicated funding process presupposed. 1868 teufte to the Ottiliae Schacht 's new main production well and thus extended to existing Erzkahnförderung on the depths of the water route to the new shaft from.
At that time, the ores in the Rosenhöfer mining area were first lifted in the Rosenhöfer shaft to the 11th route, 440 meters underground, and from there in the Silbersegener shaft to the bottom of the valley, from where they were transported to the Ottiliae shaft to be placed in a secondary center to promote for days. Another problem was that the ore was pushed in further and further east.
Frequent reloading and a large number of miners created unnecessary costs. It was impossible to catch up with production failures or to increase production, mainly due to the ore barges, whose maximum speed was 0.2 m / s. For these reasons, the decision was made to set up the deepest waterway as a new collection conveyor line. This was driven through the Rosenhof pit to the Ottiliae shaft and between 1900 and 1905 the shaft was sunk further to the level of the deep water section. Then the Rosenhöfer shaft was thrown off.
As a replacement, from 1905 the Thekla shaft was sunk 300 m east of the Rosenhöfer shaft from the deepest waterway. Three collection points were set up on the deepest waterway and the existing extraction was expanded with a mine railway . Since the staff of the Rosenhöfer Revier used the Ottiliae shaft to drive in and out, special transport vehicles for people were constructed.
In the next 25 years, the Thekla shaft reached its maximum depth of 242 meters at the level of the 23rd section and took over the extraction of ores from six sections below the deepest waterway.
In 1930 the operation of the shaft and all other pits around Clausthal-Zellerfeld was discontinued due to the global economic crisis and the associated low metal prices. The shaft has sunk nowadays .
technical description
In order not to increase the operating costs any further and to make the existing hydropower of Clausthal's new ore processing available in full, it was decided to use electricity. Since different machines, water turbines and gas engines had to be connected to a common network, 500 V direct current was chosen. This also had the advantage of storing energy that is not required in accumulators during breaks .
A compressor and a conveyor reel were installed at the shaft. The compressor was a two-stage single-cylinder compressor (New Meyer system) for belt drive , which sucked in 435 m³ of air with a piston stroke of 250 mm and 180 / min and compressed it to 6 atm . The power requirement on the compressor shaft was 46 to 47 hp ; the engine had 820 rpm at 425 V.
The conveyor reel was designed for a shaft depth of 200 m and a conveyor cage weighing up to 750 kg . The wire rope had a diameter of 22 mm. The drum shaft of the reel carried cylindrical drums with a width of 1.25 meters. It was driven by the countershaft via two pairs of spur gears, which in turn was driven by the engine via a gearwheel and a rawhousing pinion. The maneuvering brake worked on the countershaft, the safety brake on the drum shaft. It was based on the safety devices that had already been installed in the Ottiliae shaft. The motor of the conveyor reel was a single pole direct current shunt motor (425 V, 350 / min, 47 HP continuous operation, 90 HP acceleration period).
See also
literature
- Wilfried Ließmann : Historical mining in the Harz . 3. Edition. Springer, Berlin 2010, ISBN 978-3-540-31327-4 .
- Friedrich Balck : The Great Clausthal - Views of an industrial landscape and its people in the past and present . 1st edition. Fingerhut Verlag, Clausthal-Zellerfeld 2001, ISBN 3-935833-02-4 .
- Schennen: The new installations of the Royal Mining Inspection in Clausthal . In: Glückauf - Berg- und Hüttenmännische magazine . June 1, 1907, p. 657-674 .
Individual evidence
- ↑ a b Balck: The Great Clausthal. 2001, p. 25.
- ^ Ließmann: Historical mining in the Harz. 2010, p. 162.
- ↑ a b c Schennen: The new installations of the Royal Mining Inspection in Clausthal. In: Glückauf - Berg- und Hüttenmännische Zeitschrift , No. 22, 43rd volume, 1907, p. 658.
- ↑ a b Schennen: The new installations of the Royal Mining Inspection in Clausthal. In: Glückauf - Berg- und Hüttenmännische Zeitschrift , No. 22, 43rd year, 1907, p. 659.
- ↑ a b Schennen: The new installations of the Royal Mining Inspection in Clausthal. In: Glückauf - Berg- und Hüttenmännische Zeitschrift , No. 22, 43rd year, 1907, p. 660.