Quarrying As A Kind Of Surface Mining

Quarrying is a form of surface mining used when the rock is close to the surface of the land

. This is used for stone or rock which may need crushing with jaw crusher and impact crusher to make buildings. The quarry is an open pit mine and is less deep than other kinds. The way that quarrying is done depends on the rock that the miners are trying to get out of the ground and what the rock will be used for after its mined. For example, if they want to get an ingredient of cement, they will use explosives to break the rock into small bits. This is okay because cement needs to be in small pieces when it"s sold. If they want larger pieces of granite for kitchen countertops, the miners will drill holes in the rock, long distances apart. Dynamite will be packed into these and the blast will separate large slabs of granite that will be sliced with wire saws. There are other ways to quarry such as drilling holes, blasting dynamite to make an opening, and then blowing in compressed air [or water] that splits the rock. One of the biggest problems for quarries is drainage. Many quarries are dug in hillsides so that water can drain better.Water flows into the quarry from the surface and from the ground. The quarry needs to be pumped out to get rid of it. This adds to the costs of quarrying the rock. When the mining is over, the area can become a landfill that is filled with refuse and garbage until it fills the pit and is covered over with layers of dirt. This is called reclamation. In our area, most quarries are abandoned and left as a giant pit. Then they refill with water and become a small pond or lake. This may sound nice, but most of our quarries are considered to be unsafe, unstable, unusable, and a safety problem. The presence of limestone and other types of rock in the Yorkshire Dales has led to the development of several large industrial quarries where materials are extracted for use as e.g. aggregates in road building and the construction industry, etc. Quarrying on this scale inevitably leads to irreversible environmental damage, including the permanent scarring and removal of entire hillsides and natural features and in some cases the destruction of rare habitats such as limestone pavements as well as other significant national assets. china dryer:http://www.hxjqchina.com/product-list_35.html cone crusher:http://www.hxjq-crusher.com/ There are of course arguments both for and against quarrying in the Yorkshire Dales and other established national parks and areas of outstanding natural beauty, though it should be noted that despite the promised implementation of proposed "aftercare" programmes the environmental effects and damage caused by quarrying are both large scale and permanent. Furthermore, there could well be a negative economic impact on the tourist industry caused by these kind of operations, as quarrying using modern methods is generally highly intrusive and those areas which are affected are unlikely to fulfil their true potential in attracting visitors from the UK and abroad. It might also be worth questioning the so-called "logic" which dictates that much of the rock extracted from the dales and other supposedly "protected" national parks and areas of outstanding natural beauty ends up going to build yet more roads - resulting in the destruction and concreting over of what is left of the countryside in other parts of Britain. All this at a time when alternative strategies should be being explored in order to counter the potentially cataclysmic effects of global warming.As the professional manufacturer of complete sets of mining machinery, such as china dryers, Henan Hongxing is always doing the best in products and service.

by: chris lee

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