似膏体充填系统管网参数及泵送压力选择

湖南闪星锑业有限责任公司对浅部残矿进行回采，并采用高浓度的似膏体充填系统进行充填。通过从锡矿山选场选取尾砂充填体，在实验室测试其物理力学性质，同时测定不同浓度下不同配比的充填体的抗压强度及泌水率，得出适合矿山的充填材料配比为 1∶2∶8(水泥∶粉煤灰∶分级尾砂)，质量浓度为70%~76%。通过充填管道输送参数计算，选用外径为0.114 m，壁厚为0.007 m的钢管，得出似膏体料浆的临界流速为0.97 m/s，充填料浆水力坡度为885.92 Pa/m，充填管道最大输送阻力为1.53 MPa，工业泵的启动压力2 MPa，得出泵的最小压力值为3.53 MPa，从而设计出适合锡矿山的似膏体充填系统，为矿区充填可靠性提供了保障。

Selection of Pipe Network Parameters and Pumping Pressure in Paste-like Filling System

Hunan Shanxing Antimony Industry Co.，Ltd.is planning to recover the shallow ore residues，and make backfilling with high concentration of paste-like filling system.The physical and mechanical properties of tailings backfill body selected from Tin Mine are tested in the laboratory，and its compressive strength and bleeding rate at different proportions and different concentrations are measured.A suitable filling material ratio for mines is determined to be 1∶2∶8 (cement：fly ash：classified tailings)，and its mass concentration is from 70% to 76%.Through computing transporting parameters of pipelines，a pipe with outside diameter of 0.114 m，and wall thickness of 0.007 m is selected.A series of parameters are concluded as the critical flow of paste-like slurry 0.97 m/s，hydraulic gradient of 885.92 Pa/m，maximum pipeline transport resistance 1.53 MPa，starting pressure of industrial pumps 2 MPa，and minimum pressure of the pump 3.53 MPa.Then，a suitable paste-like filling system for Tin Mine is built，which provides a guarantee for mine backfill.