银洞坡金矿地下采矿方法研究

STUDY ON THE UNDERGROUND MINING METHOD OF YIEDONGPE GOLD MINE

根据银洞坡金矿高宝山分矿矿体复杂多变、围岩稳固性差、品位不高而金属价值高的特点，试验研究了一种固定漏斗出矿留矿法。该方法吸取了留矿法和充填法的优点，工艺简单、易于掌握、作业安全，适于开采围岩不稳固的急倾斜薄矿脉；尤其在回采高品位矿脉时，可进行分采，提高了劳动生产率，取得了较好的社会和经济效益。

As to the characteristics of the ore body of Yindongpe-Gaobaoshan Gold Mine: complex in its vein, weak in stability of surrounding rock, and lower grade but high value in its gold ore, we invent, through careful investigation and experiment, a specific method,which is presented in this paper, called fixed funnel shrinkage mining method. It combines the advantages of both shrinkage and filling methods, and possesses the simplicity of itstechniques, convenience for its use and safety on its site operation. So it is suitable to be used in excavating the thin sharp slope vein surrounded with unstable rock. Especially when excavating the high grade mine, individual excavating can be used. This way can highly improve the productivity. Better economical and social benefit have been brought due to adopting the method.