Method and device for pulverizing deep-sea cobalt crust

The invention discloses a deep sea cobalt crust shattering method and a device thereof; the method adopts mechanical tooth and water jet to shatter deep sea cobalt crust in a combining way, and high pressure water flow is jetted to impact a stress area of the deep sea cobalt crust to assist to shatter the deep sea cobalt crust when mechanical force is applied by the mechanical tooth to shatter the deep sea cobalt crust. The device comprises a mechanical crushing device and a water injector which are used for acting on the deep sea cobalt crust together; the water injector includes a water tank, a high pressure pump, a first valve, an energy accumulator, a second valve, a controller and a nozzle; wherein, the water tank, the high pressure pump and a check valve are sequentially connected with each other in series and then are connected with the energy accumulator which is also connected with the nozzle by the second valve. The invention can reduce the impact load acting on a shattering head in the crushing process of the cobalt crust, and improve the travelling speed of a mining machine.