采沙船河道采沙的起因和发展
     二十世纪八十年代中后期，随着我国经济的起飞，大规模基础设施建设在启动，以及随后城市化的发展，对砂石资源的需求激增，而将河道砂石用于建设用砂具有质优，价廉的特点。因此，一些人直接将目光直接投向了河道。在当初情况下，河道采砂的监管缺位；而从事河道采沙技术要求低，也不需大量资金投入。达成了沿江沿河一些人的发财致富门路之一。如在长江，在二十世纪九十年代初，在将砂开采的暴力驱使下，各种采沙船蜂拥而至，滥采乱挖随处可见，导致一些河段的河床、滩岸和涉水工程设施以及生态环境受到破坏和损毁，海损事故频发，长江防洪和通航安全受到极大威胁，同时引发采沙纠纷甚至暴力冲突，影响社会治安稳定，还造成国有资产的大量流失等一系列问题。
   河道采砂的发展，不仅是参与人/船数量的增加，更重要的是采沙设备功率的提升，采沙用船吨位的增加。
   大规模采砂初期，河道采砂使用的是基本是抓斗式，链斗式、抽吸式等采沙机械，在市场对砂石的需求和利润的驱使下，这些设备越来越不能满足需求，并催生各类采沙机具不断升级换代，其功率也不断提升。采沙船只在增加，特别是采沙设备的能力在提升，采沙能力在发展。

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.