Study on the technique of reducing dust with high pressure spray for shearers

Abstract：Based on the hydromechanics theory, the principle of suction air about drainage spray tube is analyzed and its experiment is done.The mathematical model of relationship is established between the suction air quantity and the hydraulic pressure.It is pointed out that under the given structural parameter, the relationship between the suction air quantity and the hydraulic pressure is approximately quadratic curve.The suction air efficiency of drainage spray tube is closely related to the spray nozzle, pipe's structure and size.The relationship between tube's suction air quantity and spray nozzle's water consumption is linear, and the relationship between spraying divergence angle and the hydraulic pressure is nonlinear.The main design parameters of falling dust device with drainage and spraying are the controlled area and the air suction quantity.Under the given structure, through adjusting hydraulic pressure can make falling dust device with drainage and spraying run at the optimum state in the highest air suction efficiency.

Keyword：shearers;falling dust technique;drainage spray tube;suction air quantity;spraying divergence angle;