2 sentences

1. 他在那座煤矿工作了很多年。

   tā zài nà zuò méi​kuàng gōng​zuò le hěn​duō nián.

   He worked in that coal mine for many years.

   Source: Dong Chinese Dictionary

2. 地质学家在这个地区发现了厚厚的煤矿。

   dì​zhì​xué​jiā zài zhè​ge dì​qū fā​xiàn le hòu hòu de méi​kuàng.

   Geologists discovered a thick coal seam in this region.

   Source: Dong Chinese Dictionary