摘要
为了研究煤矸石粉煤灰充填料浆的管道输送特性,以华润电力(锡林郭勒)煤业有限公司西一矿采空区煤矸石粉煤灰充填项目为研究背景,开展了管道输送数值模拟及环管试验,分析了不同流速、不同浓度条件下充填料浆在管道输送中的沿程阻力损失特征。试验结果表明,在煤矸石粉煤灰充填料浆的管道输送过程中,管道中的流速、压力均沿着管道半径方向递减,呈现出中心大、四周小的分布规律;弯管处流速、压力分布呈现弯管外侧大,内侧小的分布规律。充填料浆的沿程阻力与质量浓度、泵送流速呈正相关关系,且质量浓度对沿程阻力损失的影响相对更大,弯管段的沿程阻力损失要略大于直管段的沿程阻力损失。由于质量浓度为68%的煤矸石粉煤灰充填料浆沿程阻力损失过大,因此在采空区充填管道输送的适宜料浆浓度为64%~66%,推荐泵送流速不低于1.8 m/s。
In order to study the pipeline transportation characteristics of coal gangue-fly ash filling slurry,taking the coal gangue-fly ash filling project in the goaf of Xiyi Mine of China Resources Power Xilingol Coal Industry Co.,Ltd.as research background,numerical simulation and loop pipe tests of pipeline transportation were carried out,the on-way resistance loss characteristics in pipeline transportation with different flow rate and concentrations of filling slurry were analyzed.The experimental results showed that in the pipeline transportation process with coal gangue-fly ash filling slurry,the flow rate and pressure in the pipeline decreased along the radius direction of the pipeline,showing the distribution law of large center and small surrounding.The flow rate and pressure distribution in the bend pipe showed the distribution law of large near the outer side of bend pipe and small near the inner side.The on-way resistance of the filling slurry was positively correlated with the mass concentration and the pumping flow rate,and the mass concentration had a relatively greater influence on the on-way resistance loss,and the on-way resistance in bend pipe was slightly larger than that in straight pipe.Due to the excessive on-way resistance loss of the coal gangue-fly ash filling slurry with a mass concentration of 68%,the appropriate slurry concentration for pipeline transportation in goaf filling was 64%to 66%,and the recommended pumping flow rate was not less than 1.8 m/s.
作者
王平
权锡柱
刘艳
陈虎
江强强
WANG Ping;QUAN Xizhu;LIU Yan;CHEN Hu;JIANG Qiangqiang(China Resources Power Xilingol Coal Industry Co.,Ltd.,Xilinhot,Inner Mongolia 026000,China;CCTEG Wuhan Engineering Co.,Ltd.,Wuhan,Hubei 430061,China)
出处
《中国煤炭》
北大核心
2024年第6期144-152,共9页
China Coal
基金
国家自然科学青年基金项目(42007279)
中煤科工集团武汉设计研究院有限公司自主研发项目(ZZYF202238)。
关键词
煤矸石
粉煤灰
充填料浆
管道输送
沿程阻力损失
coal gangue
fly ash
filling slurry
pipeline transportation
on-way resistance loss
