Download or read book Longwall Gate Road Roof Instability and Methods of Control in the Lower Kittanning Coalbed of Central Pennsylvania written by Eric R. Bauer and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Longwall Gate Road Roof Instability and Methods of Control in the Lower Kittanning Coalbed of Central Pennsylvania written by Eric R. Bauer and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LONGWELL GATE ROAD ROOF INSTABILITY AND METHODS OF CONTROL IN THE LOWER KITTANNING COALBED OF CENTRAL PENNSYLVANIA written by United States. Bureau of Mines and published by . This book was released on with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Subjacent Gob on Longwall Development Mining in the Upper Kittanning Coalbed of South central Pennsylvania written by Eric R. Bauer and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1993 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
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Download or read book Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1994 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Roof Movement Study of Mechanized Retreating Longwall Operation Lancashire No 15 Mine Bakerton Cambria County Pa written by Anthony J. Barry and published by . This book was released on 1954 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
