钙芒硝盐岩溶解机理细观研究  

Study of Meso-Dissolution Mechanism of Glauberite

作　　者：高红波[1] 徐素国[1] 韩传磊 梁卫国[1] 赵阳升[1] 

机构地区：[1]太原理工大学采矿工艺研究所,太原030024 [2]汶上义桥煤矿有限责任公司,山东济宁272000

出　　处：《地下空间与工程学报》2012年第4期722-725,共4页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(50804033);山西省基础研究计划项目(2008021032;2009011027-2);山西省重点实验室基金项目(2007031016)

摘　　要：通过对钙芒硝盐岩磨片的细观观测研究,发现溶解首先发生在其原有的裂隙内,在水的作用下随着时间的推移,原有裂隙宽度不断增加,次生裂隙数量不断增多,使相邻但初始没有贯通的裂隙最终贯通,形成溶剂流动的通道,使溶解开始正常进行。由于其组分的特殊性,易溶的硫酸钠被溶剂带走后,难溶的硫酸钙留在矿石结构中,使溶解后的钙芒硝矿石形成多孔性质的介质,孔隙率最高可达到50%,溶解的比表面积提高,溶解更易进行,渗透性能明显提高。为提高钙芒硝矿的开采效率相关研究提供指导,同时为金属矿溶浸开采和石油开采的研究也有重要的参考价值。Through the study of glauberite lapping by mesoscopic observation, we find that the solution starts from the original crack at first. With the time passing and under the effect of water, the original crack becomes wider and wider, the secondary cracks become more and more, which make the close and unconnected cracks connected. It forms the way of solvent flow and makes the solution proceed smoothly. As the components of glauberite are different from that of other salt rocks, the soluble Na2SO4 would be carried away while the insoluble CaSO4 still stays in ore. The glauberite ore becomes cellular medium after the solution. The porosity can be as high as 50%. The specific sur- face area is enlarged, so the solution works more easily and the permeability is improved greatly. The paper provides guidance on how to improve the recovery efficiency of glauberite. As a research of fundamental theory, it also provides a reference to the study of solution mining of metal mines and oil mining.

关 键 词：钙芒硝 盐岩 溶解机理 细观 实验研究 

分 类 号：TD871.1[矿业工程—非金属矿开采]