钻孔水力采矿装置的研究

国内某些矿区水文地质条件复杂,具有溶洞裂隙水丰富和矿坑涌水量大等特点,传统的采矿方法难以实施,钻孔水力开采是目前解决此问题的最佳方案之一。通过对钻孔水力开采装置工作原理的分析及结构的研究,提出其关键部件——气力泵方案的设计。为得出气举工作时运行参数,建立小型室内模拟装置,以河沙为测试颗粒,研究进气量和浸入率对排液量及排沙量的影响规律。结果表明,排液量和排沙量随气量值增加均出现一极大值与之对应,且前者峰值所处位置在不同浸入率下较为接近,但后者峰值所处位置随浸入率升高而显著左移。另外,排液量和排沙量随浸入率升高而递增。

Development of borehole hydraulic jet mining device

The hydrogeological conditions in some domestic mining district are very complex and characterized with rich fissure-cavern water and large pit inflow of water.It is very difficult to operate in the district with traditional mining methods,so borehole hydraulic jet mining(BHM) method is one of the best schemes to solve this problem.After analyzing the work principle and structure of BHM device,the design scheme of its key component air lift pump was proposed.In order to obtain the operating parameters during lifting course,a small laboratory simulation test device was set up.The river sand served as the test particle,the influential laws of air inflow and submergence ratio on water drainage and sand discharge were studied.The results showed that the maximum water drainage and sand discharge occurred as the air inflow increased,and the positions of maximum water drainage were close to each other at all submergence ratios,but the positions of maximum sand drainage obviously shifted to left as the submergence ratio increased;the water drainage and the sand drainage increased as the submergence ratio increased.