This ship is according to the passage, sand, clear, the river sand mining operations. For assembling type full steel welding mining ship. Sand principle: first, through the bridge rack cutter hydraulic mining was carried out on the water xiasha, sand were dug in rotary reamer driven and water form contains a certain ore fluid medium, distribution within the circle of reamer underwater pump suction mouth of containing ore fluid under the influence of underwater pump fluid power, into the pump and get a certain energy, fluid through the exhaust pipe into the sand carrier, transport of the designated location. 3.1 main scale length: (reamer wearing a state level) is about 23.00 m captain: 19.00 m vessel width: 7.00 m type deep: 1.27 m design draft full: 0.80 m 3.2 performance to dig deep high is about 10.0 m to 10.0 m 1.0 m suction/discharge pipe diameter: 650/600 mm pumping sand amount is about 150-250 m3 / h (sandy) depending on the specific water (1.9 T/m3 of sand density, the concentration of 20%) 3.3 mainly