Download or read book Machines for Underground Mines. Safety Requirements for Hydraulic Powered Roof Supports. Support Units and General Requirements written by British Standards Institute Staff and published by . This book was released on 2002-03 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mines, Mining equipment, Underground mining, Roofs, Supports, Hydraulic equipment, Equipment safety, Framed structures, Chocks