桃山矿胶结充填管道输送系统充填试验

为了解决桃山矿三井工作面充填开采过程中出现的堵管以及管道的高磨损率等问题,运用流体力学理论,结合该工作面的实际情况,采用自流+泵送的管道输送技术进行了工业试验,并利用ANSYS模拟分析了在速度2.0 m/s时,不同料浆浓度、管径对全程管压的影响。模拟结果表明:既定输送速度下,在合理的可控范围内且易于输送时的充填料浆浓度、管径取值范围分别为52%、140~180 mm时,输送管压分别为134.561 kPa、130.053~138.759kPa。根据模拟结果进行的工业试验表明,堵管和高磨损率等问题得到了解决,充填开采取得良好的效果,有效地控制了顶底板的变形,降低了顶板的下沉量,减少对环境的破坏,验证了该管道输送系统是一种"安全、经济、环保、可靠"的充填采煤系统,为该矿以及类似条件下的矿山充填开采提供了借鉴。

Back-filling Experiment of Cemented Filling Slurry Pipeline System for Taoshan Mine

In order to solve the problems of pipe blocking and high wear rate of pipeline during filling mining process at Sanjing working face of Taoshan Mine，industrial tests of gravity and pumping transport are carried out by adopting the fluid mechanics theory，in combination with the practical situation of the working face.The ANSYS simulation was made to analyze the effect of different slurry concentration and pipeline diameters at the given speed 2.0 m/s on the entire pipe pressure.Simulation results showed that under the given delivery speed，when the filling slurry concentration values at 52% and pipe diameter ranges from 140 mm to 180 mm，which are within the reasonable control and makes slurry transport easy，the pipeline pressure are 134.561 kPa，and ranges from 130.053 to 138.759 kPa respectively.Industrial tests together with the simulation indicated that the problems of pipe blocking and high rate of pipeline of slurry transportation are solved and backfill mining obtained good effect.The pilpline system can effectively control the deformation of roof and floor，reduce the roof subsidence and lower the environment.It is approved that it is a kind of “safe，economical，environment-friendly and reliable” filling mining system.It provides reference for filling mining of the mine and similar mines.