八台铁矿五道行出风井用普通方法掘砌到21米时,工作面冒水涌砂,井筒被淹。曾试用水泥、水玻璃和水玻璃、氯化钙浆液灌注,均未成功。从1972年10月着手进行水玻璃、铝酸钠化学注浆研究工作。从1973年5月至9月完成了第一阶段的注浆工程。又用一个半月时间进行注浆效果的检查和补充注 When the five outlets of the eight iron mines were excavated to 21 meters by ordinary methods, the working surface was flooded with sand and the wellbore was flooded. Trial of cement, water glass, water glass, and calcium chloride slurry was unsuccessful. From October 1972, we started the study of water glass and sodium aluminate chemical grouting. The first phase of the grouting project was completed from May to September 1973. One and a half months to check and supplement the grouting effect