三山岛金矿充填用水中Cl－、SO2－4和Mg2＋等离子浓度较高，影响充填体的强度。根据海水和粉煤灰的化学成分检测结果，分析研究海水中氯盐、硫酸盐、镁盐对充填体的破坏机理以及在尾砂胶结充填中粉煤灰在活性效应、粉末效应和形态效应3个方面的作用机理。分析认为，海水成分中的硫酸盐、氯盐和海水的弱碱性成分对化学激发粉煤灰活性发挥重要作用。因此，为了提高海水条件下充填体的强度，添加粉煤灰不仅可以减少海水中相关离子对充填体强度的影响，而且海水中的部分化学成分对粉煤灰活性的激发作用可以进一步提高粉煤灰的胶凝作用。
The filling seawater affects the strength of the filling body in Sanshandao Gold Mine,because there are higher ionic concentrations of Cl-,SO2-4 ,Mg2+and other ingredients.The paper,based on the analysis result of chemi-cal compositions of the seawater and fly ash,analyzes the failure mechanism of the filling body resulting from the chlo-ride,sulfate,magnesium in seawater,as well as the fly ash mechanism in three aspects of the activation effect,powder effect and morphology effect in cemented tailings backfilling.Analysis believes that sulfate,chloride and weak alkaline compositions in seawater play an important role in the chemical activation of fly ash.Therefore, the strength of the backfill under seawater conditions is improved by adding fly ash,because it can reduce the adverse effect of seawater-related ions on filling body strength,and part of the chemical compositions of seawater can stimulate the activity of fly ash and thus further improve the jelling effect.
参考文献
| [1] | 王成;毕洪涛;胡国宏.全尾砂海水胶结充填在大型机械化开采中的应用[J].金属矿山,2009(增刊1):268-271. |
| [2] | 祝丽萍,倪文,黄迪,惠美,高术杰.粉煤灰全尾砂胶结充填料[J].北京科技大学学报,2011(10):1190-1196. |
| [3] | 胡家国,古德生.粉煤灰作为水泥替代品用于胶结充填的试验研究[J].矿业研究与开发,2002(05):5-7,14. |
| [4] | 侯运炳;王炳文;饶运章.应用粉煤灰生产胶结充填材料的作用机理和试验研究[J].金属矿山,2003(增刊1):279-283. |
| [5] | 冯国瑞,任亚峰,张绪言,郭育霞,康立勋.塔山矿充填开采的粉煤灰活性激发实验研究[J].煤炭学报,2011(05):732-737. |
| [6] | Steve W.M. Supit;Faiz U.A. Shaikh;Prabir K. Sarker .Effect of ultrafine fly ash on mechanical properties of high volume fly ash mortar[J].Construction and Building Materials,2014(Jan.):278-286. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%