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| 1 | Coupled effect of cement hydration and temperature on hydraulic behavior of cemented tailings backfill显示文摘Cemented tailings backfill(CTB) is made by mixing cement, tailings and water together, thus cement hydration and water seepage flow are the two crucial factors affecting the quality of CTB. Cement hydration process can release significant amount of heat to raise the temperature of CTB and in turn increase the rate of cement hydration. Meanwhile, the progress of cement hydration consumes water and produces hydration products to change the pore structures within CTB, which further influences the hydraulic behavior of CTB. In order to understand the hydraulic behavior of CTB, a numerical model was developed by coupling the hydraulic,thermal and hydration equations. This model was then implemented into COMSOL Multiphysics to simulate the evolutions of temperature and water seepage flow within CTB versus curing time. The predicted outcomes were compared with correspondent experimental results, proving the validity and availability of this model. By taking advantage of the validated model, effects of various initial CTB and curing temperatures, cement content, and CTB's geometric shapes on the hydraulic behavior of CTB were demonstrated numerically. The presented conclusions can contribute to preparing more environmentally friendly CTB structures. | 吴迪 蔡嗣经 | 2015 | Journal of Central South University2015，22，5： | 9 |
| 2 | 两种不同井网稠油的渗流压力场分布显示文摘采用边界元方法(BEM),通过求解变系数达西方程,数值模拟了不同温度和压力边界条件下,稠油在九点和二十五点井网时的渗流压力场分布。数值模拟结果表明:压力边界条件对稠油渗流压力场的分布有重要影响,并且注入井与生产井之间的压力耦合效应非常明显。温度的变化使稠油在储层中的渗流阻力和能量损耗发生变化,这种变化导致稠油渗流场的压力发生相应的变化。数值模拟结果可为稠油开采中的井位部署提供定量的理论依据。合理的数值结果表明,边界元方法能够有效处理复杂压力边界条件时的稠油渗流问题。 | 焦焕 代玉杰 王学慧 鞠启明 | 2019 | 石油化工应用2019，38，9： | 3 |
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