紫金山金铜矿大直径深孔阶段矿房法的试验

Research of Large Diameter Long-hole Sublevel Room Mining in Zijinshan Gold-Copper Mine

紫金山金铜矿上部金矿体为大规模露天开采，下部隐伏厚大铜矿体为井下开采，是一座典型的地下露天联合开采矿山。铜矿采用平硐-溜井联合开拓系统，为保证金矿与铜矿同时开采的安全，铜矿采用棋盘式框架矿柱结构，矿房矿柱分二步骤回采。经过技术与经济论证，一步骤矿房采用阶段矿房法回采，并于2004年完成了试验研究，获得良好效果。

Zijinshan Gold-copper Mine is a typical open-pit and underground-combined one, with large-scale opencasting used for the upper gold deposit and underground mining for the lower large hidden thick copper deposit. The copper ore will be mined by adit and pass-combined development system. To ensure the safety of simutaneous mining of gold and copper deposits, ore pillar structure with chessboard type frame will be adopted and the rooms and pillars are to be extracted in two steps. Through the technical and economical proof, sublevel room mining will be used for the first-step room extraction. The test research was completed in 2004 and achieved good results.