(1. 江西理工大學(xué) 建筑與測(cè)繪工程學(xué)院，贛州 341000；
2. 中國(guó)科學(xué)院 西北生態(tài)環(huán)境資源研究院，蘭州 730000；
3. 江西理工大學(xué) 江西省礦業(yè)工程重點(diǎn)實(shí)驗(yàn)室，贛州 341000)
摘 要: 在離子型稀土原地浸礦中，合理設(shè)置注液井網(wǎng)有利于提高資源回收率，計(jì)算井網(wǎng)參數(shù)的關(guān)鍵環(huán)節(jié)是確定單井注液影響范圍，即濕潤(rùn)體特征及濕潤(rùn)鋒運(yùn)移規(guī)律。通過(guò)不同水頭下稀土入滲試驗(yàn)可知，其濕潤(rùn)體形狀近似為半橢球體，入滲初期橫向濕潤(rùn)距離較垂向濕潤(rùn)距離大，隨著入滲的進(jìn)行，垂向濕潤(rùn)鋒的發(fā)展速度較橫向濕潤(rùn)鋒的增大，濕潤(rùn)體形狀由半橢球體向半球體發(fā)展。濕潤(rùn)體體積和累計(jì)入滲量之間存在顯著的線性關(guān)系，表明濕潤(rùn)體內(nèi)平均含水率增量基本上保持為一定值，橫向和垂向最大濕潤(rùn)距離與入滲時(shí)間存在極顯著的冪函數(shù)關(guān)系。基于Green-Ampt模型和水量平衡原理，建立了濕潤(rùn)體特征值計(jì)算模型，模型結(jié)果與試驗(yàn)結(jié)果吻合度較高，具有較高應(yīng)用價(jià)值。根據(jù)三維Green-Ampt模型入滲能力曲線可知，隨著時(shí)間的延長(zhǎng)三維入滲率增加，這是三維入滲模型與一維入滲模型的顯著區(qū)別。
關(guān)鍵字: 恒定水頭；離子型稀土；單井注液；計(jì)算模型
（1. School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Sciences, Lanzhou 73000, China;
3. Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:Reasonable set of fluid injection wells of ion type rare earth in-situ leaching is conducive to improve the recovery rate of resources, and the key step in calculating parameters of wells is to determine effect range of single well injection, which means characteristics and migration laws of the moist body. It can be seen that the shape of moist body is approximately semi-ellipsoid through the infiltration experiments of rare earth under different heads. In the initial stage of infiltration, the transverse wetting distance is larger than that of vertical orientation, with infiltration, vertical development rate increases more quickly, and the shape of moist body develops from semi ellipsoid to hemisphere. The significant linear relationship between commulative infiltration and volume of moist body show that the increment of average moisture content nearly maintains a constant, moreover, there is an power function relationship between the horizontal and vertical maximum wetting distance and the infiltration time. The calculation model of the characteristic value of moist body was established based on the Green-Ampt model and the principle of water balance, and the results based on the calculation model fit well with that of experiments. According to the infiltration capacity curve of three-dimensional Green-Ampt model, it can be concluded that the three-dimensional infiltration rate increases with the increase of time, which is sharply distinctive from one-dimensional model.
Key words: constant-head; ion-absorbed rare earth; single hole injection; calculation model
