
Deposits mined underground work or open operations . There is no natural lighting in the underground work , called the underground operations, Quarry plant also known as the underground quarry . Exploitation of the quarry plant, the natural light and is referred to as the quarry .
The quarries environment destruction causes
Quarry sources of ecological damage can be divided into two categories: the human destruction and natural destruction . Whether the destruction of man-made or natural destruction, and will eventually lead to destruction of vegetation , bare land , soil erosion , environmental degradation, the destruction of the natural landscape of a series of serious ecological problems .
The destruction of the source
(1)The basic building establish the damage . To establish some base line building site at the quarry site identification , these buildings will make the location on the original plant was destroyed , reducing vegetation cover area .
(2)The damage caused by the mining . Give the ecological environment , a great deal of harm in the process of excavation of rock in a quarry .
Prior to mining , to want to vegetation on the excavation of rock , soft soil treatment, the felling of trees , the burning of vegetation of no use to the stonework on the soft soil , tillage , these will make the vegetation to a significant reduction in , making the soil water and soil lower retention capacity .
Mining process, the stripping part of the topsoil , a certain impact on the original vegetation . Meanwhile , the main seam is mined - will cause serious leakage and overlying aquifers with structural damage , the plants lose the living conditions ; a large number of mining stone , destroyed the mountain vegetation , accelerate the development of soil erosion . Excavation of the foot of the slope , cut slope , resulting in the imbalance of the mountain . With the gradual expansion of the quarry mining , the exposed surface will further expand the temporary abandon the mound surface expansion will increase the exposed surface , all this will exacerbate soil erosion .
After mining , the hillside accumulation of solid waste , adding to the load , leading to landslides continue to occur . Some waste land will be transported to the river directly to the dumping of these waste soil was washed away with the impact of the river , to a certain extent also caused serious soil erosion . Moreover, people do not attach importance to the vegetation , etc. , destruction of vegetation can not be restored to some extent makes soil erosion , environmental degradation , natural landscape damage .
At this stage, the vast majority of China 's small and medium-sized quarry plant hillside type quarry , the annual production scale of 3-5 million tons of mining areas is generally less than 0.01KM2 the quarry largest mining height of 20-50 m , small mining boundary of the mining right permit , the original slope of the stope topography steep , so a multi - step extraction step is arranged between the mechanical transport roads difficult , and often technically infeasible , the stope to the use of artificial transportation , steps require multiple transit, economic and obviously unreasonable . Small quarry with the lack of multi - step extraction of natural conditions , difficult to promote .
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