Tear

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The miner describes the tearing down of loose pieces of rock, shells or lumps of coal from the roof , the joints or the face as tearing , driving away or robbing .

Basics

During blasting work, the rock loosens up, so that there can be a risk of falling rocks or coal, especially in local drifting. In order to avoid this hazard, the rupture after blasting is particularly important for the safety of the miners .

In ore, salt and potash mining , cavity reduction leads to convergences . These in turn lead to detachments on the roofs and joints. So that no one is endangered by the loose ridge material, the ridge must be reworked regularly.

early detection

In order for the miners to recognize the dangers of falling rocks or coal in good time, they receive regular training. In salt and potash mining, the miners are instructed and trained to recognize detachments on the roof in good time.

But the latest technology is also used to make the miner's dangerous work easier. For example, special vehicles equipped with fired radar are used in potash mining in order to identify and eliminate hazards in good time.

Working method

The loose rock is removed by a miner using a robber / tear bar or a wedge hoe . To do this, the miner pushes against the roof and the joints from a safe and protected place or leverages cracks in the rock with the pulling rod in order to finally loosen areas that have already been loosened. Then the cap segments are placed on the so-called pre- pledging rails. Under this protective roof which is by means of local handlers debris removed. If the debris is removed, the joints and the face can also be cracked. After the expansion has been introduced, the joints and roofs no longer need to be torn. The face is temporarily secured by means of face protection.

Snap bars can be up to 4 m long. To make them light and manageable, they are made of aluminum tubing with a steel tip and steel handle.

In salt and potash mining, manual robbery using a robbery rod is not possible, or only possible with great effort, due to the height of the routes and chambers. Therefore, special robbery vehicles are used here to tear down . The use of robbery vehicles is far more effective than manual tearing down. Robbing the roofs in the mining areas and the rear pits is also much safer through the use of robbery vehicles. In order to be able to recognize the dangerous places at these great heights, special robbery lights are used.

literature

Individual evidence

  1. ↑ BFS aktuell 3/03 Maintenance work in cross passage 1 east of the Gorleben exploration mine ( Memento from October 21, 2004 in the Internet Archive )
  2. ↑ K + S Information 2/2000 article: On the trail of the solver. Ridge radar vehicle detects detachments in the overburden
  3. ↑ K + S information 4/2005 Increase in performance underground. ecco-Salzwerk Borth puts new mining vehicle into operation.
  4. ^ Annual report 2005 of the mining authorities of the state of North Rhine-Westphalia. New mining vehicle in the Borth rock salt mine

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