The U.S. Bureau of Mines is investigating longwall panel layouts to maximize coal recovery and minimize interactive problems in multiple-seam operations. When coalbeds are longwall-mined in descending order, the transfer of stress from overlying gate roads ...

<p>This report is intended as a guideline and not as a comprehensive documentary of mine equipment. Installation of equipment in a mine should be done only by people thoroughly qualified to do such work. Installations should follow procedures recommended by ...