Last edited by Faugor
Friday, December 4, 2020 | History

2 edition of Surface subsidence over a room-and-pillar mine in the western United States found in the catalog.

Surface subsidence over a room-and-pillar mine in the western United States

Jeff A. Magers

Surface subsidence over a room-and-pillar mine in the western United States

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  • 32 Currently reading

Published by U.S. Dept. of the Interior, Bureau of Mines in Washington, DC .
Written in English

    Places:
  • Colorado,
  • Palisade Region.
    • Subjects:
    • Mine subsidences -- Colorado -- Palisade Region.,
    • Coal mines and mining -- Colorado -- Palisade Region.

    • Edition Notes

      Includes bibliographical references (p. 15).

      Statementby Jeff A. Magers.
      SeriesInformation circular ;, 9347, Information circular (United States. Bureau of Mines) ;, 9347.
      Classifications
      LC ClassificationsTN295 .U4 no. 9347, TN319 .U4 no. 9347
      The Physical Object
      Pagination15 p. :
      Number of Pages15
      ID Numbers
      Open LibraryOL1395420M
      LC Control Number93002741

      The EIA estimated that approximately 69% of United States coal was produced by surface mining methods in The remaining 31% was produced by underground mining methods, which include room and pillar mining and longwall mining (more fully described in Item 1. Business, under the heading “Mining Methods”). The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and since the s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United States, United Kingdom, and South Africa, a coal mine and its structures are a "colliery". Both types of collapse have affected the surface over domes with significant sulfur production. Boling Dome is an example of a dome with abundant surface subsidence over the area of sulfur production. In a circular collapse feature developed on the surface over . Most underground coal is mined by the room and pillar method, where by rooms are cut into the coal bed leaving a series of pillars, or columns of coal, to help support the mine roof and control the flow of lly, rooms are 2, feet wide and the pillars up to feet wide. At least 60 feet of coal was left between an underground mine and the surface, if not the surface had a higher.


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Surface subsidence over a room-and-pillar mine in the western United States by Jeff A. Magers Download PDF EPUB FB2

Get this from a library. Surface subsidence over a room-and-pillar mine in the western United States. [Jeff A Magers] -- This report summarizes the results from the subsidence research study completed by the U.S.

Bureau of Mines at the Roadside Mine, Powderhorn Coal Co., Palisade, Co. This research was conducted from. Get this from a library. Surface subsidence over a room-and-pillar mine in the western United States. [Jeff A Magers; United States. Bureau of Mines.]. Surface subsidence over a room-and-pillar mine in the western United States /, by Jeff A.

Magers (page images at HathiTrust) Research report and recommendations for the House Executive Subcommittee on Mine Subsidence / ([Springfield]: The Staff, ), by Illinois. efficient than room-and-pillar mining, it is being promoted increasingly in the United States. Also, longwall mining induces a generally uniform and contemporaneous surface subsidence that can be Technical terms used herein are defined in the glossary, p.

more accurately forecast than subsidence caused by room-and-pillar by: Roger J. Missavage; Surface subsidence due to weak floor strata over a shallow room-and-pillar mine room and pillar Mine Engineer. Room and pillar mining is still very common in underground coal In some room & pillar mines, on retreat mining.

Federal and State agencies that have inactive mine subsidence information: United States Department of the Interior Office of Surface Mining (OSM) Federal Reclamation Projects Branch Brooks Towers 15th Street Denver, Colorado () OSM handles emergency subsidence reclamation projects in Colorado and other western States.

Inactive Coal Mine Subsidence; Where Coal and Coal Mines Occur; Mining Methods; Figure 6b is an aerial photo of a shallow room and pillar mine.

Surface Subsidence Over a Room-and-Pillar Mine in the Western; Jan 1, ; resources, protecting our fish and wildlife. pre. Coal mining is the process of extracting coal from the ground.

Coal is valued for its energy content and since the s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is a pit, and the.

Search the history of over billion web pages on the Internet. search Search the Wayback Machine. Featured texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) Genealogy Lincoln Collection. Books to Borrow. Top American Libraries Canadian.

three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in the West: 1) room and pillar with contin-uous miners, and 2) longwall mining; recent underground mining technology developments in Europe and the West-ern United States that could affect the.

Surface subsidence over a room-and-pillar mine in the western United States /, by Jeff A. Magers (page images at HathiTrust) Basic geological and analytical properties of selected coal seams for coal interface detection /, by S.

Maksimovic, Gary L. Mowrey, and United. @article{osti_, title = {Subsidence misconceptions and myths}, author = {Gray, R E and Bruhn, R W and Knott, D L}, abstractNote = {Subsidence due to coal mining is poorly understood by non-specialists.

This has led to numerous misconceptions and myths based on limited observations and lack of knowledge. The three most common are: (1) Mine maps are inaccurate, (2) Deep mines are not a. Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United States.

Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of the United States.

Although widely used inFile Size: KB. @article{osti_, title = {Investigation of subsidence event over multiple seam mining area}, author = {Kohli, K K}, abstractNote = {An investigation was performed to determine the sequence of events which caused the surface subsidence and related damage to several homes in Walker County, Alabama, USA.

Surface affects compared to mine maps indicated the subsidence to be mine. Surface subsidence over a room-and-pillar mine in the western United States [microform] / by Jeff A. Ma Colorado: the queen jewel of the Rockies. A description of its climate and of its mountains, rivers, fo Providing Location Information for Colorado Library Resources [microform] / Karl M.

Pearson, Jr. Studies estimate that billion tons of coal, representing 68 pct of the minable reserves in the United States, is subject to multiple-seam mining.

Historically, room-and-pillar mining has dominated coal production, and this mining method has been the focus of most multiple-seam research. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.

Surface mining began in the midth century [dubious. to surface mining) or room-and-pillar mining (bord-and-pillar mining) were sometimes adopted to control strata movement and reduce mining subsidence.

However, partial extraction methods may. The openings in the timber sets are filled, so that after min- ing is completed, only a minimal amount of collapse of the mine workings can occur.

A number of metal mines in the United States have used this and similar mining methods. Figure 2. Room and pillar. Fcjes, A. Surface Subsidence Over Longwall Panels in the Western United States: Monitoring Program and Final Results at the Price River Coal Co.

3 Mine, Utah. BuMines IC ,21 pp. In a study of mine subsidence in the Colorado Springs coal field by the Dames and Moore consulting firm intrough-like subsidence over room-and-pillar mines was observed to be irregular, and the authors of that report interpreted that the interior of any given subsidence trough would likely undergo varying periods of tension and.

Enhancing Mine Subsidence Prediction and Control Methodologies. Room and pillar mine under a planned surface facility (dark (OSM), United States Depart ment of the Interior, under the.

As coal mining methods and activities have changed over the years, the effects on the geologic conditions have also changed.

Underground operations have grown from small family mines to obtain house coal for heating to large, commercial operations, and the respective mining methods have changed from narrow, hand-cut tunnels, through room-and-pillar mines with pillars left in the mines to.

ic / surface subsidence over longwall panels in the western united states, monitoring program and preliminary results at the deer creek mine, utah, pb, $ 16 ic / platinum availability-market economy countries: a minerals availability system appraisal, pb, $ 15 ic / acid mine drainage: control and abatement research, pb, $ Coal miners leaving an American mine at the end of a shift (April ) Surface coal mining in Wyoming in the United States.

A coal mine in Bihar, India. A coal mine in Frameries, Belgium. Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the s, has been widely used to generate electricity. Search the history of over billion web pages on the Internet.

Full text of "Subsidence information for underground mines-literature assessment and annotated bibliography" See other formats. Coal mining is the process of extracting coal from the ground.

Coal is valued for its energy content, and, since the s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine a pit, and the. Subsidence at surface is generally of fairly lengthy duration owing to timedependent processes around the mining horizon. Initial failure of roof in minedout rooms of stable pillar layout.

Figure Development of general surface subsidence depression over abandoned room and pillar. Room-and-pillar coal mining can be classified further as conventional or continuous depending on the method of extraction at the face.

In conventional mining, the mining cycle consists of cutting, drilling, blasting, loading, hauling, and roof bolting, and specially designed machines are utilized for each step.

This book is an outcome of the twenty-sixth symposium on "Rock Mechanics: Research and Engineering Applications in Rock Masses" in U.S. It focuses on the problems associated with rock mass and many experiments and modeling techniques are being performed in this area.

The Quecreek Mine rescue took place in Somerset County, Pennsylvania, when nine miners were trapped underground for over 77 hours, from July 24 to 28, All nine miners were rescued.

2 Rescue operations. Initial response. Drilling and efforts to slow flooding. Issues during drilling operation. Resumption of on: Lincoln Township, Somerset. Thus, coal from the western United States (despite the transportation costs) is a more cost-effective choice than coal from the eastern United States.

Coal exports. Although coal is primarily consumed within its country of origin, there exists a significant international market in coal, with 15% of coal used globally coming from imports. Early room-and-pillar mines did not include retreat mining; they relied on manual labor to cut the coal at the working face and the coal was hauled from the mine by horse and wagon.

Today, many room-and-pillar mines use mechanized continuous mining machines to cut the coal and a network of conveyors that transports the coal from the working. A drift mine extends directly into a coal bed at an outcrop and follows the bed upward, usually at a slight angle to facilitate drainage.

A slope mine extends downward at an angle of 45° or more to a fixed landing. The shaft mine uses a vertical entry to reach a desired point below the surface, where gangways would be driven into the coal Size: 1MB.

Subsidence over a room and pillar mine in the Appalachian coal province and the use of subsidence predictive methods - A comparative analysis Computer modeling of the surface effects of subsidence control methods Surface subsidence resulting from longwall mining in central Utah — A case study Rock mass characterization in deep.

In room and pillar mining, it is generally not possible to predict the development of subsidence over abandoned mines without knowledge of the mine dimensions and size and height of pillars. Pillars may fail after years have elapsed and the amount of movement will depend on the room space available into which they can collapse.

As when the ceiling of a cave collapses, the subsidence of a coal mine leaves a visible depression above ground. Uplift. As its name implies, uplift describes a process and results opposite to those of subsidence. In uplift the surface of Earth rises, owing either to a decrease in downward force or to.

Coal mining explained. Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the s, has been widely used to generate electricity.

Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal. The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and, since the s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

In the United States, United Kingdom, and South Africa, a coal mine and its structures are a colliery. Using data from the Energy Information Administration and private sector surveys, the report describes major changes in the geologic, technological, and operating characteristics of longwall mining over the past decade.

Most important, the report shows how these changes led to dramatic improvements in longwall mining productivity. In the latter stages of mine development some 60% of the spent shale residue could begin t o be returned to the mine, by conveyor or perhaps as a slurry.

Little or no surface subsidence is expected from room and pillar mining of the type by: 3.The subsidence over a longwall face is generally more uniform than it is over room-and-pillar workings.

If conditions are such that the roof will not cave or subsidence to the surface is not allowable, it will be necessary to backfill the void with materials such as sand, waste from coal-preparation plants, or fly ash.Mining methods became much more efficient over the course of the twentieth century.

Traditional "room and pillar" mines had been improved in the s by conveyor equipment and rotating drums that shredded coal surfaces with dramatic speed, but more significant was the adoption of longwall mining operations for bituminous, beginning in the s.