膏体充填料浆管输摩阻损失计算及应用研究

Calculation and application of friction loss in slurry pipeline transportation with paste filling

为系统地计算与应用摩阻损失,利用流态性质对膏体充填料浆流态进行了分析判断,基于摩阻损失计算方法与结果研究了料浆质量分数、流量及管径对摩阻损失的影响规律,计算分析了料浆的沿程损失与设计泵压并对工业应用提出建议,并对Z3DEEP区进行工业充填输送。研究结果表明:膏体充填料浆在管道输送中的流态为均质流、柱塞流,属于宾汉姆塑性体;相同条件下,摩阻损失随质量分数或流量的增加均增大,质量分数对摩阻损失的影响程度远大于流量的影响,而摩阻损失随管径的增大显著减小;相同充填区域的沿程损失随质量分数提高显著增加;相同质量分数下的沿程损失从大到小排序与料浆输送区域难易程度一致,均为Z3TOP区、Z3DEEP区、Z2TOP区。建议矿山最大设计泵压取10 MPa,在管道输送中选用D150管及将流量控制在100 m^(3)/h以内,输送至Z3TOP区、Z3DEEP区和Z2TOP区的最大质量分数分别为73.1%、74.1%和74.4%。设计泵压与允许充填料浆质量分数满足工业应用要求。

In order to calculate and apply friction loss systematically, flow pattern of paste filling slurry was analyzed and judged according to flow pattern properties. Based on calculation method and results of friction loss, influence of slurry mass concentration, flow rate, and pipe diameter on friction loss were studied. The route loss of slurry and design pump pressure were calculated and analyzed, suggestions for industrial application were put forward, and industrial filling transportation was carried out in Z3DEEP. The results have shown that the flow pattern of paste filling slurry in pipeline transportation is homogeneous flow and plug flow, a kind of Bingham plastic body. Under same conditions, friction loss increases with the increase of mass concentration or flow rate, and influence degree of mass concentration on friction loss is far greater than that of flow rate, but friction loss decreases significantly with the increase of pipe diameter. The route loss in same filling area increases significantly with the increase of mass concentration. At the same mass concentration, order of route loss is consistent with difficulty degree of slurry transportation area, which, from large to small, are Z3TOP, Z3DEEP and Z2TOP. It is suggested that maximum design pump pressure of the mine should be 10 MPa, D150 pipe should be selected in pipeline transportation and the flow rate should be controlled within 100 m^(3)/h;the maximum mass concentration of backfilling slurry transported to Z3TOP, Z3DEEP and Z2TOP are 73.1%, 74.1% and 74.4%, respectively. The design pump pressure and allowable mass concentration of filling slurry meet the requirements of industrial application.