鉱山

1. Origins, structure, and basic meaning

• Structure: 鉱山 (こうざん) is a noun for a site and associated facilities where ore or coal is extracted.
• Basic usage: 閉鎖された鉱山の跡 is a former extraction site converted for tourism, while 鉱山で使われた道具 marks the industrial setting where researched tools were used.

2. Common pitfalls and similar expressions

• Closed mine remains and former workplace
  • 鉱山の跡 is a site after extraction ended, whereas 鉱山で使われた gives the tools’ former setting. Conversion to a tourist facility does not mean mining continues.