underground mining drift
Drift mining - Wikipedia
Drift mining is either the mining of an ore deposit by underground methods, or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed. A drift mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam.
Drift mining - Infogalactic: the planetary knowledge core
Drift mining is either the mining of an ore deposit by underground methods, or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed. A Drift Mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam.
Abandoned Underground Mines of Ohio
a ﬁ nal phase of mining, known as "pulling pillars" or "pulling stumps," to maximize resource recovery. If pillars are not removed, only 50–70 percent of the resource is recoverable. FIGURE 1.—Types of underground mining methods used in Ohio. Drift mine Slope mine Shaft mine COAL FIGURE 3.—Longwall underground-mining method.
Underground mining (hard rock) - Wikipedia
Mining - 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. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on …
Mining Facts for Kids - Kiddle
Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining.Today, surface mining is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores.
Crosscut and drifts - Minerals, Mining and Miners of ...
In Bisbee, crosscut and drifts are the terms used for all horizontal mine workings which, are commonly thought of as "tunnels" by the general public. The terms drift and crosscut have been corrupted by Bisbee miners. The actual definition of crosscut is horizontal workings that cross perpendicular to the trend of the ore or mine workings.
Underground Mining Development . Different Access to Ore Bed . Mining Cycle . Some Examples . Surface mining Development . Blasting . Explosives . Drift or Tunnel Blasting . Blast Pattern Design . Firing Sequence . Smooth Wall Blasting . Supporting . Objective . Material Used and reinforced . Typical rockbolt systems .
Earth Science: Underground Coal Mining.
Mar 14, 2013· The mine enters the seam in a horizontal direction following the coal. A drift may or may not intersect the ground surface. This kind of mining is done when the rock or mineral is on the side of a hill. The advantages is drift mining is much cheaper and much safer. Drift mining …
Underground Drilling and Blasting Training DVD - ACG
Oct 24, 2012· Underground mine workers - the need to identify the potential hazards of working near or with explosives, and the protocols of re-entering a working area after blasting.
Types of Underground Mining Method Comparison
In any discussion of Methods of Underground Mining Comparison, one is repeatedly confronted with the difficulty of dealing with so many variable conditions. It is not an exact science and in the choice of a method each varying factor has a certain weight, which, in many cases, experience alone can determine.
Mining Project: Blast Damage Control to Reduce Injuries ...
Apr 11, 2016· Ground control and safety implications of blast damage in underground mines. A practical, yet technically sound, design procedure for pre-split blasts. Evaluation of Kiruna mine drifting data using the NIOSH design approach. Use of a 3-D scanning laser to quantify drift geometry and overbreak due to blast damage in underground manned entries
Sketches of Alaska: Modern Placer Drift Mining - Chatanika ...
Nov 05, 2011· Modern Placer Drift Mining - Chatanika Valley, Alaska When its -40 ° F. above ground, its only +28 ° F. underground I had a mining engineer friend who, knowing I was interested in modern mining as well as mining history, invited me to see an operating placer drift mine operation in the Chatanika Valley.
Slope Mining, Shaft Mining, Drift Mining, Mining ...
Slope Mining With fast progress of modern industry, the demand for products manufactured from metal ores has gone up literally. In order to meet this demand, the awareness of uninterrupted mining, which can sharply elevate stope productivity and cut mining costs, has become a big trend in the development of mining techniques in underground mines.
Glossary of Mining Terms - rocksandminerals.com
Drift — A horizontal passage underground. A drift follows the vein, as distinguished from a crosscut that intersects it, or a level or gallery, which may do either. Drift mine — An underground coal mine in which the entry or access is above water level and generally on …
Underground Mining Transportation & Haulage Systems
Another underground conveyor belt that was also used in connection with open-pit mining operations was installed at the New Idria mine. This is probably one of the earliest installations in an underground metal mine. It was employed principally to convey waste from the hanging wall of the ore deposit to a …
How Underground Mining Works - HowStuffWorks
There are hard-rock underground mines, and there are soft-rock underground mines. Coal deposits, for instance, live in relatively soft sedimentary rock. Gold deposits live in igneous or metamorphic rock, which is relatively hard, as do diamonds, copper, silver, nickel and zinc [source: Great Mining ...
Excavation Methods - Drifts/Inclined Shafts/Declines ...
Drifts/Inclined Shafts/Declines. Excavation methods for drifts are likely to be the same whether straight or with a change of direction. There are 3 methods which …
Underground Mining Transportation Systems - eolss.net
CIVIL ENGINEERING – Vol. II - Underground Mining Transportation Systems - K. Matsui ©Encyclopedia of Life Support Systems (EOLSS) 2.2. Inclined Shafts or Inclined Drifts Many underground mines use an inclined shaft fo r the transport of pe rsons, materials and equipment to and from the underground. Figure 3 shows an inclined drift at Ikeshima
Glossary of Hardrock Mining Terms - miningquiz.com
DEFINITION OF HARDROCK MINING TERMS Adit - A level, horizontal drift or passage from the surface into a mine. Borehole - A vertical or inclined hole, used for ventilation from one level to another, or to carry waterlines or electrical wires. May be large enough for a …
Underhand Cut and Fill Mining as Practiced in Three Deep ...
Underhand cut and fill mining methods are used at the Lucky Friday, Stillwater, and Galena mines in the western US in an effort to safely mine in difficult ground conditions and as a primary mining method where access below the ore is limited. The method has evolved at each mine to meet the unique situations associated with their milling procedure
Drift mining | Wiki | Everipedia
Drift mining's wiki: Drift mining is either the mining of an ore deposit by underground methods, or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed. A drift mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam.
Glossary of Mining Terminology - Glace Bay
Draegermen - A mine worker or official, engaged in mine rescue while wearing a self-contained breathing apparatus. Drift - The passage through which air is drawn into the mine. Drill - Any tool used for boring holes underground. Drive – To excavate a passage. Driver - A workman, usually a boy, who drives an underground work horse.
Here are the Types of Underground Mining and Their ...
Feb 28, 2018· Here are the Types of Underground Mining and Their Applications. The method to be used for underground mining depends on the concentration of ore, strength of the surrounding rock, and the various risks involved. ScienceStruck explains …
What are some of the most important disadvantages and ...
Sep 06, 2016· Underground Mining is a method of Mining, where the mineral is extracted without removing the top soil and rocks. In this way we do not disturb the surface feature such as forest, agriculture land, rivers and residential areas. The major disadvant...
Find out some pros and cons of underground mining in the ...
Sep 08, 2015· An underground aggregate mine is a different world than a surface operation, presenting unique challenges that surface mining does not. It can be a costly undertaking, requiring special engineering of tunnels, rooms, and pillars that are dependent on the geology of …
Top ten mining terms you should know – MINING.COM
Jul 28, 2014· Here's a list of ten interesting mining terms you might like to know, if you don't already. We've "mined" the nuggets on this list from social news site Reddit, where various ...
Drift Mining, Mining Process, Mining Techniques, Gold ...
Drift mining is used to access a range of minerals like gold, coal, quartz, and zinc. It poses high economical means of recovery than other more invasive types of underground mining …
Tutorial# 2 Underground mine design: Drift design - YouTube
Jun 23, 2016· Learn An Old Timer's Secrets To Mig Weld Aluminum Without A Spoolgun - Duration: 29:23. Stairway To Video Editing for Beginners 772,141 views
Glossary of Mining Terms - coaleducation.org
Drift - A horizontal passage underground. A drift follows the vein, as distinguished from a crosscut that intersects it, or a level or gallery, which may do either. Drift mine – An underground coal mine in which the entry or access is above water level and generally on …
Drift | mining | Britannica.com
In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.
MINE VENTILATION SYSTEMS - web.mst.edu
Mine Fan Main Levels R R D D 1 2 3 Figure 9-1. Basic ventilation system underground where D is a ventilation door or airlock, R is a mine regulator and 1, 2, 3 are working places with a surface exhaust fan. To maintain adequate ventilation through the life of a mine…
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