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南京九华山铜矿安基山矿区铜硫矿床,赋存于闪长玢岩与大理岩接触带,矿体节理、裂隙发育,闪长玢岩易风化裂解,稳定性差,特别是当采幅大于4米时,若仍用普通浅眼留矿法生产,安全作业受到威胁,贫化、损失率增加,经济效益不高。为寻求解决在不稳定矿岩中扩大留矿采矿法的应用范围和新的采矿方法,省科委和省冶金厅下达了科研任务,要求试验采场最终贫化率控制在20％,损失率在1％以内。
The copper-sulfur deposit in the Anji-shan mining area of Nanjing Jiuhuashan Copper Mine occurs in the contact zone between diorite and marble. The ore body joints and fissures are developed. The diorite porphyrite is easily weathered and cracked, with poor stability. Especially when the amplitude is greater than 4 If the rice is still produced by ordinary shallow-hole retention method, the safe operation will be threatened, depleted and the loss rate will increase, so the economic benefits will not be high. In order to find out the application range and new mining methods of expanding ore-retention mining method in unstable ore, Provincial Science and Technology Commission and Provincial Metallurgical Department issued scientific research tasks, requiring the final dilution rate of pilot stope to be controlled at 20% and the loss rate Within 1%.