Example: biology
Introduction to longwall mining and subsidence
Found 2 free book(s)
Introduction to Longwall Mining and Subsidence ver2
www.minesubsidence.comMine Subsidence Engineering Consultants 3 August 2007 CHAPTER 1. INTRODUCTION TO LONGWALL MINING AND SUBSIDENCE 1.1. The Longwall Mining Process Fig. 1.1, below, shows a cutaway diagram of a typical longwall mine.
Highwall Mining Extend Mine-able Reserves - sacea.org.za
www.sacea.org.zaMining Coal from 1. a visible, horizontal or inclined coal seam, making 2. rectangular, parallel, unsupported entries, with 3. unmanned cutter head and coal transport system, which