煤坑

例句：

1. 1. The coal mine is located in the remote mountainous area.
   这个煤矿位于偏远的山区。
2. 2. The coal mine has been closed due to safety concerns.
   由于安全担忧，这个煤矿已经关闭了。
3. 3. The coal mine provides employment for many people in the region.
   这个煤矿为该地区许多人提供了就业机会。