Customer satisfaction is the core of all our service. 24 Hours online customer service

[email protected] 60s quick online response

  1. Home
  2. Coal Mining Work Clothes

Coal Mining Work Clothes

2013-5-21 · Underground mines are the alternative to surface mines. Surface mines excavate from the top down, a method that can become inefficient at depths greater than about 200 feet (60 meters) [sources: Illinois Coal Association, De Beers].Undergrounds coal mines can drive 2,500 feet (750 meters) into the Earth and other types even deeper -- uranium mines can reach 6,500 feet, or 2 kilometers.

Send Email:[email protected]

Leave Comments Chat Online

Hot Articles

focus on sand and aggregate information. Focus on industry trends, focus on information value, and tap business opportunities in the era.

Latest blog

focus on sand and aggregate information. Focus on industry trends, focus on information value, and tap business opportunities in the era.