Longwall gate road roof instability and methods of control in the Lower Kittanning Coalbed of Central Pennsylvania.
Authors
Bauer-ER; Listak-JM; Krupa-ED
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9331, 1992 Jan; :1-20
Abstract
This report presents the results of a cooperative study to investigate longwall development entry roof instability. In-mine mapping of geologic and deformational features was conducted to reveal the major ground control problems encountered during gate road development. In addition, mining-induced pillar load monitoring was used to indicate development loading on variously dimensioned gate road pillars and to determine if pillar yielding occurred.
Keywords
Underground-mining; Mining-engineering; Mine-haulage; Loads-forces; Stability; Columns-supports; Roof-bolts; Longwall-mining; Underground-supporting; Roofs
Document Type
IH; Information Circular
NTIS Accession No.
PB93-132140
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9331
