摘要
对适应缓倾斜中厚矿体的、放矿层高在极限高度左右的放矿制度进行了研究。模拟实验中矿石保持一定湿度,使模拟的放出椭球体与实际情况基本相符。对参与实验的四种放矿制度进行了技术和经济分析。结论:适应缓倾斜中厚矿体的放矿制度,可提高矿石实际回收率5％,平均贫化率降低10％左右。
Research is made in this paper on the ore-drawing order which is suitable for underground mines in which the orebodies dip at slow angle and are middle thick, and the ore drawing height is approximarely equal to its ultimate height. The imitation tests are carried out under certain condilions that ore humidity keeps close to certain one so that the imitated extraction ellipsoids basically tally with the actual situation. Afterwards the writors analyse both tech nologically and economically4kinds of ore-drawing order which partieipate in the tests. The final conclusion is as follows, The oredrawing order can be used in mining the dip at slow angle and middle thickness orebodies, it is reckoned that with it being used in mines the ore actual recovery rate is increased by 5％ upon and the ore average dilution rate is spproximately reduced dy 10％.
关键词
放矿制度
极限高度
分段崩落法
ore-drawing order
ultimate height
extraction ellipsoid
