What is a quarry? Detailed answer

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What is a quarry? Detailed answer

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What is a quarry?

Stone quarrying is the process of extracting stone from the ground. Stones can be mined in solid blocks or slabs or crushed rubble. Blocks or slabs are used in construction. Crushed stone is used for laying roads. There are different types of quarries. In some, the stone is found in the form of a huge solid mass. In others, the stone forms layers of varying thicknesses.

A quarry is a large depression in the ground. Sometimes it is wide and shallow, and sometimes it is a deep, narrow well. The workers in the quarries have to use ladders or are lowered into the quarries by mechanical means. In quarries, water is often a problem. This is due to the fact that the quarry, like a large stone bowl, collects and stores all the rainwater that has fallen into it. In such cases, water has to be pumped out.

Sometimes the mined stone is underground. Such a quarry is called a shelf. In such a quarry, machines can go right up to the stone and tow it away. How to decide where to open a quarry? You need to do research first. Geologists can tell where a good rock is likely to be. Then you need to take a sample of the stone.

During the study, several holes are drilled in different places on the site. Special drills are used to cut out the core of the stone, about 5 cm in diameter, which is brought to the surface and examined. Some drills can penetrate up to 850 m deep. The assay indicates whether the stone is good enough to make the quarry profitable.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Who is Hercules?

Everyone knows that Hercules was an extraordinary strong man. However, for the ancient Greeks, his name meant much more. They worshiped him as if he were one of the gods.

According to legend, Hercules was the son of the god Zeus and the mortal woman Alcmene. Hera, the divine wife of Zeus, hated him. When Hercules still could not walk and was lying in his cradle, she sent two snakes to him to kill him. However, the baby easily dealt with them, strangling them both. As an adult, Hercules married Megara, but Hera sent him into a fit of madness. In a fit of crazy rage, he killed his wife and children. To make amends, Hercules, at the direction of the oracle in Delphi, offered his services to King Eurystheus, who instructed him to perform twelve labors.

The story of these exploits is devoted to most of the myth of Hercules. He began by strangling a ferocious lion. Then he killed the Hydra, a monster with nine heads, eight of which were mortal and one was immortal. Whenever Hercules cut off one mortal head from the Hydra, two grew in its place.

His third feat was to capture an exceptionally strong and vicious wild boar. According to the fourth order of Eurystheus, Hercules brought him a doe with golden horns.

Then Heracles had to clear manure from the huge barnyard of King Avgii, which had not been cleaned for 30 years. Hercules changed the channels of two rivers, directing them to the barnyard, and that one was clean in just a day.

The sixth feat of Hercules was the expulsion and murder of the Stymphalian birds that devoured people; the seventh was the capture of the Cretan bull.

The eighth task was to tame the wild mares of King Diomedes, who fed them human meat.

Hercules accomplished the ninth feat by obtaining for the daughter of Eurystheus the belt of Hippolyta, the queen of the Amazons.

The tenth feat was to deliver the cows of Gerion from an island that lay far to the west in the ocean. On the way, Hercules, having reached the western tip of Europe, split the rock and formed the Strait of Gibraltar.

To accomplish the eleventh feat, Hercules, on behalf of Eurystheus, obtained the golden apples of the Hesperides.

Hercules performed the twelfth feat by bringing to the king a watchdog who stood at the gates of Hades, the kingdom of the dead, Kerberos.

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