srednyakov

Thanks for attention to my work!

This quarry has diameter approximately 1 km (it is an oval 1,1х1,2 km more precisely). Depth = 515 m. Length of road of the leader downwards = 7,5 km. It kimberlite pipe. Here got an open mean ore which contains the best in the world diamonds! Now extraction here is intercepted, as at such dimension of a quarry it became unprofitable. The reconnoitered depth bedding of diamonds - more than 1,2 km, therefore nearby have already built the underground pit conducting deep into under a quarry. Soon it will start in maintenance... In this region it is a lot of diamonds. On density it is the high-grade deposits in the world. Approximately 3-4 carats on one ton of ore. Here some large quarrys and some underground ore mines. And also in some places diamonds lay open stream gravels... Sometimes them get by means of the floating dredge. Thus, that extraction of diamonds here has very big scale, the reconnoitered but not run in deposits here in tens times more... Besides, here extraction of semiprecious stones, an oil recovery, a gas production and other minerals is conducted...

Such at us land in Russia :)