The Upper Silesian question and Germany's coal problem,

Bibliography: p. [160]-162.

Monopolistic combinations in the German coal industry,

"Bibliographical references": p. [328]-334.

Welfare of coal miners, : report to accompany S. 1310.

Caption title.

The predicted impact of the black lung benefits program on the coal industry /

Cover title.

Land reclamation requirements and their estimated effects on the coal industry /

Bibliography: leaves 33-34.

History of the manufacture of iron in all ages, and particularly in the United States from colonial time to 1891. Also a short history of early coal mining in the United States ...

Mode of access: Internet.

Colliery working and management, comprising the duties of a colliery manager, the superintendence & arrangement of labour & wages, and the different systems of working coal seams,

Some of the plans and forms are folded.

Coal resource classification system of the U.S. Geological Survey /

Mode of access: Internet.

Annual report by the State Inspector of Mines to the Governor of the State of New Mexico

Title varies slightly

Final environmental impact statement supplement for the Federal Coal Management Program /

Item 603-G

Draft environmental impact statement on the Energy Transportation Systems Inc. coal slurry pipeline transportation project /

Cover title : Environmental impact statement energy transportation system, inc.

Green River - Hams Fork regional coal environmental impact statement : draft /

April 1980.

San Juan River regional coal : environmental impact statement.

"March 1984"--Final.

A Guide to Surface Features Related to Underground Coal Mining

The purpose of this guide is to assist investigators conducting geologic hazard assessments with the understanding, detection, and characterization of surface features related to subsidence from underground coal mining. Subsidence related to underground coal mining can present serious problems to new and/or existing infrastructure, utilities, and facilities. For example, heavy equipment driving over the ground surface during construction processes may punch into voids created by sinkholes or cracks, resulting in injury to persons and property. Abandoned underground mines also may be full of water, and if punctured, can flood nearby areas. Furthermore, the integrity of rigid structures such as buildings, dams and bridges may be compromised if mining subsidence results in differential movement at the ground surface. Subsidence of the ground surface is a phenomenon associated with the removal of material at depth, and may occur coincident with mining, gradually over time, or sometimes suddenly, long after mining operations have ceased (Gray and Bruhn, 1984). The spatial limits of underground coal mines may extend for great distances beyond the surface operations of a mine, in some cases more than 10 miles for an individual mine. When conducting geologic hazard assessments, several remote investigation methods can be used to observe surface features related to underground mining subsidence. LiDAR-derived DEMs are generally the most useful method available for identifying these features because the bare earth surface can be viewed. However, due to limitations in the availability of LiDAR data, other methods often need to be considered when investigating surface features related to underground coal mining subsidence, such as Google Earth and aerial imagery. Mine maps, when available, can be viewed in tandem with these datasets, potentially improving the confidence of any possible mining subsidence-related features observed remotely. However, maps for both active and abandoned mines may be incomplete or unavailable. Therefore, it is important to be able to recognize possible surface features related to underground mining subsidence. This guide provides examples of surface subsidence features related to the two principal underground coal mining methods used in the United States: longwall mining and room and pillar mining. The depth and type of mining, geologic conditions, hydrologic conditions, and time are all factors that may influence the type of features that manifest at the surface. This guide provides investigators a basic understanding about the size, character and conditions of various surface features that occur as a result of underground mining subsidence.

Chemistry of acid production in black coal mine washery wastes

Column leaching tests on black coal mine washery wastes were performed, to determine the chemistry of acid generation. Coal mine coarse rejects and tailings were subjected to wet and dry cycle dissolution and subsequently column leached. The rates of iron sulphide oxidation and carbonate mineral dissolution were determined based on the drainage chemistry. The kinetic data from column leach experiments are used to predict the time required to deplete the acid producing and acid consuming minerals in the mine wastes. The acid production in the mine rejects was found to depend upon iron chemistry, carbonate chemistry, diffusion of oxygen, and permeability. The chemistry of the drainage from two different coal mines is compared. (c) 2005 Elsevier B.V. All rights reserved.