+
News
  1. Home
  2. News
  3. crushing plant
  4. tertiary crusher vs face lift

tertiary crusher vs face lift

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face

Get Price List Chat Online

GET A QUOTE

Note: If you're interested in the product, please submit your requirements and contacts and then we will contact you in two days. We promise that all your informations won't be leaked to anyone.

News List

Last News

Our products sell well all over the world.