分段全面留矿法在东大山铁矿的试验研究

东大山铁矿的矿体属倾斜薄矿体、上盘围岩不稳定，一直未能开采。上种采矿方法的比较，选择了分段全面留矿法进行现场开采试验。实践表明，该方法适应性强、灵活性大、采场结构简单，较适合该难采矿体的开采要求。

Experiment and Study of Sublevel Full shrinkage Method in Dongdashan Iron Mine

To date,Dongdashan Iron orebody,which is a inclined thin orebody,due to the instability of its hangingwall layer,can't be mined.By comparison of four mining method,the sublevel full shrinkage is selected to conduct the exeperiment and study.The practice shows that this mining method have fine suitability and flexibility,and simple stope structure,and is fit for mining requrement of this orebody.