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The cause of river channel sand mining large junk and the development
In mid and late 1980 s, with China's economic take-off, large-scale infrastructure construction at startup, and then the development of urbanization, the surge in demand of sand resources, and will be used sand river sand used in construction is high quality, cheap characteristics. As a result, some people will look directly into the river directly. In the original case, river channel sand mining in the absence of regulation; And engaged in river channel sand mining technical requirements is low, also do not need a lot of money. Reached one of the enrichment of some people along the river along the way. Such as in the Yangtze river, in the early 1990 s, the sand mining of violence, all kinds of mining in large junk, excessive mining dig everywhere disorderly, leading to some of the river bed, frontage and wading engineering facilities as well as ecological environment is damaged and damaged, frequent accidents at sea, the Yangtze river flood control and navigation safety under great threat, sand disputes and even violence at the same time, influence social security, also cause huge loss of state-owned assets, such as a series of problems.
The development of the channel sand is not only an increase in the number of participants/ship, more important is sand equipment power to ascend, sand with the increase of the tonnage.
Early sand mining, the river channel sand mining are using basic clamshell, chain bucket, suction type, such as sand mining machinery, the market demand for sand and profit driven by these devices is more and more can't meet the demand, and create all kinds of mining machinery constantly upgrading, its power is also rising. Sand ships on the rise, especially sand equipment's ability in raising, sand ability in development.