Our Activities | DiscoverE Engineering Thank you for signing up for our monthly e-newsletter. DiscoverE will not sell your information. This simply helps us show our partners and funders what organizations are using our resources. The New King Coal: the unlikely comeback of the mining . The New King Coal: the unlikely comeback of the mining industry Oil is running out, Russia controls most of Europe's gas and our weary nuclear generators are on their last legs. Port Manteaux Word Maker - OneLook Dictionary Search Port Manteaux churns out silly new words when you feed it an idea or two. Enter a word (or two) above and you'll get back a bunch of portmanteaux created by jamming together words that are conceptually related to your inputs. Service Online
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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 .
Coal mining - Choosing a mining method | Britannica.com
Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam .
SCIENCE HOBBYIST: Electricity F.A.Q. ANSWERS
BACK TO ELECTRICITY FAQ. WHAT IS "ALTERNATING CURRENT?" AND "DIRECT CURRENT?" In an AC system, the wires are filled with vibrating charges. In a DC system, the wires are also full of charges, but the charges flow constantly forward, like a rubber drive-belt.
Glossary of Inventory Management and Warehouse Operation Terms
Glossary of Inventory Management and Warehouse Operation Terms . All definitions written by Dave Piasecki. Below are some of the terms, acronyms, and abbreviations you may run into on this site and others on the web relating to inventory operations.
Glossary of Mining Terms - rocksandminerals.com
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 .
Crusher - Wikipedia
A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can .