矿山 (kuàng shān) literally means 'ore mountain' — 矿 (kuàng) refers to mineral ore or mining resources, and 山 (shān) means 'mountain'. Together, they denote a physical site where minerals such as coal, iron, or gold are extracted from the earth. Though 'mountain' appears in the word, a 矿山 need not be located on an actual mountain; it may be an open-pit excavation, underground tunnel system, or even a coastal sand-mining area. The term emphasizes the industrial function rather than topography.

This word is used formally and technically — common in news reports, government documents, safety regulations, and industry discussions. It differs from the more general word 矿 (kuàng), which can mean 'mine' as an abstract concept or resource, and from 采矿场 (cǎi kuàng chǎng), a more descriptive synonym meaning 'mining site'. 矿山 carries connotations of scale, infrastructure, and long-term operation, not just temporary digging.