Washing Water Calculation Model of Long-Distance of Ultra-Deep Shaft Filling Pipe
Clean filling pipe can not only reduce the resistance along the paste transportation,but also avoid the occurrence of pipe blockage accident.In order to study the influence of pipe length,filling gradient,flow quantity and slurry mass fraction on the amount of pipe washing water,a self-made filling pipe cleaning test device was used to carry out pipe cleaning test.The results show that there is a proportional coefficient I between the amount of pipe washing water and the volume of the washed pipe,which is 0.87-1.60.The amount of pipe washing water increases linearly with the increase of pipe length,increases in power function with the increase of filling gradient,decreases in power function with the increase of flow quantity,and decreases linearly with the increase of slurry mass fraction.There is a critical value for the flow rate of pipe washing water.When the shear stress of pipe washing water on the residual paste in the pipe is equal to its yield stress,the washing water is converted from laminar flow to turbulent flow.Based on the proportional coefficient I,the pipe washing water consumption calculation model constructed by the model test was extended to the industrial prototype,and the reliability of the model was verified by the measured data.The prediction error of pipe washing water is less than 10％.
The amount of pipe washing waterFilling pipePipe cleaningCalculation modelCritical velocity
万方数据
维普
