In 1993,underground mining was carried out in Zijinshan Gold Mine,and after several extensions opencast mining was accepted in 1997.

• 紫金山金矿于1993年首先进行地下开采,几经扩建后1997年转向露天开采,当年实施上部矿体覆盖层揭顶大爆破,低成本大批量剥离废石;