Information Circular 9466 Geologic Hazards and Roof Stability in Coal Mines

Name: Information Circular 9466 Geologic Hazards and Roof Stability in Coal Mines
Price: 14.17 USD
Availability: InStock
ISBN: 9781493735747

ISBN-10: 1493735748

ISBN-13: 9781493735747

Edition: N/A

Authors: Gregory M. Molinda

List price: $14.99

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Description:

The U.S. underground coal miner faces a continuing hazard from the fall of roof. At the root of many injuries and fatalities are weak or defective roof strata. Throughout mining history, millions of miles of entry have provided exposure of every conceivable geologic roof hazard. This report describes the geologic origin, association, and potential danger from the most common hazards. Discussions of weak rock include drawrock, rider coals, head coal, stackrock, and stream valley effects. Discontinuities, or roof defects, are described including, clay veins, slickensides, joints, and paleochannels. A number of examples from U.S. coalfields are used to document geologic structure and…

Book details

List price: $14.99
Publisher: CreateSpace Independent Publishing Platform
Publication date: 11/12/2013
Binding: Paperback
Pages: 40
Size: 8.50" wide x 11.00" long x 0.10" tall
Weight: 0.330
Language: English