| Rockburst is one of the difficult problems influencing colliery exploit safe. In recent years, utilize high pressure rotatory water efflux hole in coal seam, with high-efficient, energy-conservation, hole big, form regular, broken rock efficiency high advantage its, win the favor from vast engineers and technicians deeply. Study and determine efflux nozzle of performance become the focus that technical staff pays close attention to. This text, after analysing the interdependent relation between the flow law of the efflux, broken rock mechanism and the parameter of nozzle, the lead impeller nozzle and the auto-rotate nozzle were manufactured.And draft the on-the-spot experiment through the indoor experiment, every parameter of the lead impeller nozzle such as efflux pressure, target distance, attack time parameter to hole influence is analyzed. Adopting the method that the theory combines with experiment, solve the problem of rotate, seal, speed of assigning limit of the torsion, nozzle initially sequentially, nozzle assign and limit speed problem.Using direct current generator principle, set up electromagnetic limit speed auto-rotate nozzle stable state operate circuit, mechanics, energy equation. Discuss the relation between efflux power and rotational speed tentatively. Studies have shown, lead impeller nozzle it forms the hole to be equal to size of the nozzle, gush out from light, difficult to arrange bits and realize it cut one layer of advantages effectively; Under the equal condition, rotate the nozzle by oneself, can be designed in accordance with the actual need while vary the size of aperture of hole, gush out the distance longer effectively, it is apt to give play to the role of its pulse broken rock.
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