Influence of subjacent gob on longwall development mining in the Upper Kittanning Coalbed of south-central Pennsylvania
Our rough guess is there are 3,250 words in this book.
At a pace averaging 250 words per minute, this book will take 0 hours and 13 minutes to read. With a half hour per day, this will take 1 days to read.
How long will it take you?
This book will take an estimated to read at a reading speed averaging words per minute. With 30 minutes per day, this will take to read.
Enter your reading speedYou can take one of our WPM reading speed tests to find your reading speed.
Create a free account to track your reading progress, build your reading list, and set reading goals.
Author
Contributions
- Chekan, G. J. - Contributor
- Sames, Gary P. - Contributor
Publication
1992 - Bureau of Mines, U.S. Dept. of the Interior, Washington, D.C, District of Columbia
Language
English
Word Count
3,250 words, Guess
Page Count
13 pages
Identifiers
- Library of Congress Control Number91043726
- Open LibraryOL1562289M
Classifications
- DDC622 s
- DDC622/.334
- LCCTN23 .U43 no. 9403
and 1 more
- LCCTN288 .U43 no. 9403
Subjects
Topics
Longwall miningCoal mine wasteGround control (Mining)Longwall mining -- Pennsylvania -- Ebensburg RegionCoal mine waste -- Pennsylvania -- Ebensburg RegionGround control (Mining) -- Pennsylvania -- Ebensburg Region
Places
PennsylvaniaEbensburg Region
Series Statement
- Report of investigations ;
- 9403
- Report of investigations (United States. Bureau of Mines ;
Reader Reviews
No reviews yet for this book.
Be the first to share your thoughts!