Hour (mining)

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In mining, the hour is the horizontal direction of a mine . The term hour is derived from the hour division of the pit compass. This compass has an hour ring with 24 equal parts. The hour 24 points north on this compass.

Basics

Pit structures must be created according to your planning. In the excavation of routes or tunnels while the exact heading while the excavation is very important. The miner uses the term "hang the hour" to indicate the direction of a route . If the miner maintains the direction of strike of a deposit while driving, he calls it staying in the hour . If he does not maintain the direction of the stroke, this deviation from the direction of stroke is called coming from the lesson or turning out of the lesson (kicking, throwing). If the direction of the stroke is changed, the miner calls this move the hour . In relation to the geological conditions of a deposit, the straight, level main line of a deposit is referred to as the hour of strike . If a corridor changes its direction of strike, the miner says the corridor has thrown out of his hour (turned).

Hang hour

Dangling red marked dipsticks to determine direction

To hang the hour, you need a string about 5 meters long, a pit compass and a plummet. The cord is compared with the sink iron in the center of the track in the ridges attached. A solder is attached to the plumbing iron . The middle of the route has now been determined. After the route has been driven a few meters, the hour is rescheduled. For this purpose, the pit compass is attached to the other end of the cord. Then this loose end of the cord on the roof is moved until the attached compass shows the required hour. The now defined second point is also fixed with a plumbing iron. A plumb bob is also attached to this plumbing iron. With these two plumbs you can determine the direction of the route with the aid of a miner's lamp as you drive further. For this, the light beam must be brought into the hanging hour. However, only lamps with a reflector can be used here, as a light beam is required to illuminate the plumb lines. The miner calls the line marked by the two perpendiculars the line of fire . In order to be able to recognize the plumb lines better, they can be colored white. This makes them stand out better against the dark background of the route. Another way to improve visibility is to dye the solder lines black. A board painted white or a white handkerchief is then held behind the rear cord. This makes the dark cord stand out from the brightly lit area. In the case of high pit spaces, a spreader (board) is used as an extension. The delivery point is plumbed down onto this spreader. The second point is also plumbed onto a spreader. This point is then transferred to the roof.

Individual evidence

  1. ^ A b Heinrich Veith: German mountain dictionary with evidence . Published by Wilhelm Gottlieb Korn, Breslau 1871
  2. ↑ Carl von Scheuchenstuel : IDIOTICON the Austrian mining and metallurgy language . kk court bookseller Wilhelm Braumüller, Vienna 1856
  3. ↑ a b c d O. Brathuhn: Textbook of practical Markscheidekunst . Published by Veit & Comp., Leipzig 1884
  4. ↑ a b Franz Rziha: TEXT BOOK OF THE ENTIRE TUNNELING ART . Second volume, Verlag von Ernst & Korn, Berlin 1872, Verlag von Veit & Comp., Leipzig 1884