Longwall Mining Overview | Introduction | underground COAL
LONGWALL MINING Overview. In the method of secondary extraction known as longwall mining a relatively long mining face (typically in the range 100 to 300m but may be longer) is created by driving a roadway at right angles between two roadways that form the sides of the longwall block, with one rib of this new roadway forming the longwall face.
Faced with growing pressure to stop the ravages of mountaintop removal in the Appalachian coal fields, coal companies have quietly been expanding the use of longwall mining in southwestern Pennsylvania and now in central Illinois.
Underground mining (hard rock) - Wikipedia
Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds.
Carlson Software - Underground Mining
Carlson Underground Mining -- For Precise Design, Scheduling, and Mapping Create complete mine projections and ventilations in minutes vs. hours with all the tools needed for precise design and scheduling The Carlson Underground Mining module enables users to individualize their design with:
Mining - Underground mining | Britannica.com
Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered.
Open Cut or Underground Mining - Bend Tech Group
Method used depends greatly on the mineral’s location Mining allows for the extraction of minerals from the Earth. There are many materials that can be mined. The location of the mineral and its proximity to the surface typically determines the type of mining that is used.
Glossary of Mining Terms - Coal Education
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 ...
Ashton Coal - Official Site
The Ashton Coal Project (ACP) is a coalmine located 14 km northwest of Singleton in the Hunter Valley region of New South Wales. The project includes an open cut coal mine, an underground coal mine, a Coal Handling and Preparation Plant and a rail siding.
Underground Mining Methods: Engineering Fundamentals and ...
Underground Mining Methods: Engineering Fundamentals and International Case Studies [William A. Hustrulid, Richard L. Bullock] on Amazon.com. *FREE* shipping on qualifying offers. Underground Mining Methods presents the latest principles and techniques in use today.
Lunar Mining – Underground Coal Mining Services
Lunar Mining is a specialist provider of underground contracting services in the Bowen Basin and across Queensland.We specialize in delivering value & sustainability through safe, professional & productive services.