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84 pages • missing pub info (view editions)
ISBN/UID: 9781493566549
Format: Paperback
Language: English
Publisher: Createspace Independent Publishing Platform
Edition Pub Date: 23 October 2013
Description
Until the early 1980s, mine face ventilation systems were designed for ventilating cutting depths up to 20 feet. Since that time, use of remotely operated mining machines have allowed cutting depths to increase to 40 ft, increasing concerns about ...
Community Reviews
Content Warnings
84 pages • missing pub info (view editions)
ISBN/UID: 9781493566549
Format: Paperback
Language: English
Publisher: Createspace Independent Publishing Platform
Edition Pub Date: 23 October 2013
Description
Until the early 1980s, mine face ventilation systems were designed for ventilating cutting depths up to 20 feet. Since that time, use of remotely operated mining machines have allowed cutting depths to increase to 40 ft, increasing concerns about ...
Community Reviews
Content Warnings