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Monday, May 18, 2020 | History

2 edition of Laboratory characterization of immediate floor strata associated with coal seams in Illinois found in the catalog.

Laboratory characterization of immediate floor strata associated with coal seams in Illinois

Yoginder P Chugh

Laboratory characterization of immediate floor strata associated with coal seams in Illinois

by Yoginder P Chugh

  • 45 Want to read
  • 23 Currently reading

Published by Illinois State Geological Survey in Champaign, Ill .
Written in English

    Subjects:
  • Ground control (Mining) -- Research -- Illinois,
  • Rock mechanics -- Research -- Illinois,
  • Coal mines and mining -- Research -- Illinois,
  • Mine subsidences -- Research -- Illinois

  • Edition Notes

    Statementby Yoginder P. Chugh
    SeriesIMSRP -- no. 2, IMSRP (series) -- 2
    ContributionsIllinois State Geological Survey, United States. Bureau of Mines, Illinois Mine Subsidence Research Program
    The Physical Object
    Paginationvi, 112 p. :
    Number of Pages112
    ID Numbers
    Open LibraryOL14426345M

    In order to make sure the reasonable roadway layout in lower seam of close coal mining group coordination in Lijiahao coal mine, firstly, applying the theoretical analysis and geological radar detection to get the influence depth of mining from the up coal seam to the floor is about 20m, the results show that the thickness of complete strata is about 15m, then determining to use the Cited by: 2.   Therefore, the amount of coal waste has increased. Most of the OSD is associated with mining of immediate roof strata. However, in the Interior Coal Basin in the Midwestern USA as much as m of dilution actually comes from the mining of the floor due to weak floor strata below the coal by: 8.

    Report on the Availability of the Herrin Coal Treworgy, C.G., C.P. Korose, and C.L. Wiscombe, , Availability of the Herrin Coal for Mining in Illinois: Illinois State Geological Survey, Illinois Minerals , 54 p. Factors used to define Herrin Coal resources available for underground mining Technological restrictions Minimum seam thickness. Borehole shear tests were conducted to determine cohesive strength, angle of internal friction, and failure envelope for floor strata at different depths. An attempt was made to correlate the above data with laboratory determined strength deformation characteristics.

    The immediate roof is sandy mudstone, its thickness from m to m, and its Protodrakonov scale of hardness , a lower strength. The immediate floor of the face coal seam is mudstone and sandy mudstone, its average thickness m. The main floor of m thickness is Taiyuan formation No limestone, its strength is higher. @article{osti_, title = {Coal mine floor heave in the Beckley coalbed, an analysis. Report of investigations }, author = {Aggson, J.R.}, abstractNote = {The floor heave ground control problems that have been encountered in a new underground coal mine in West Virginia are described. Previous experience in the coal seam, the results of physical property investigations, and in situ.


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Laboratory characterization of immediate floor strata associated with coal seams in Illinois by Yoginder P Chugh Download PDF EPUB FB2

Laboratory characterization of immediate floor strata associated with coal seams in Illinois (IMSRP) [Chugh, Yoginder P] on *FREE* shipping on qualifying offers. Laboratory characterization of immediate floor strata associated with coal seams in Illinois (IMSRP)Author: Yoginder P Chugh.

Get this from a library. Laboratory characterization of immediate floor strata associated with coal seams in Illinois. [Yoginder P Chugh; Illinois State Geological Survey.; United States.

Bureau of Mines.]. Laboratory characterization of immediate floor strata associated with coal seams in Illinois Welcome to the IDEALS Repository JavaScript is disabled for your : Yoginder Chugh.

Laboratory characterization of immediate floor strata associated with coal seams in Illinois Author: Yoginder P Chugh ; Illinois Mine Subsidence Research Program. In Illinois the commonly mined coal seams, Springfield (No.

5) and Herrin (No. 6), are generally associated with relatively weak ( MPa unconfined compressive strength) and relatively thick ( m) weak floor by: 3.

Two reports are being prepared, Laboratory Characterization of Immediate Floor Strata Associated with Coal Seams in Illinois and In-Situ Characteristics of Coal Mine Floor Strata in Illinois, Y.

Chugh et al. Mitigation In the coming year, members of the University of Illinois Agronomy Department will be working with coal companies and landowners to assess the effectiveness of. The Baker coal is in the Shelburn Formation of the McLeansboro Group in western Ken­ tucky.

(6) In Illinois (Hopkins and Simon, ) and Indiana (Mastalerz and Harper, ), the Springfield, Herrin, and Danville Coal Members, as well as most other coals, are formally recognized stratigraphic Size: 2MB. because of high ash content related to immediate roof and floor strata associated with a coal seam.

The mining of the immediate roof and floor strata, along with rock bands in the coal seam, represent in-seam and out-of-seam dilution (OSD). Since only OSD may be controlled, most of the discussion here refers to OSD only. The. Near some channels, coal may be thick, low in sulfur and high in ash content-and split.

(overbank or floodwater deposits in peat swamps) that are layers of noncoal materials divide coal seams horizontally; they either make it impossible to mine the seam as one unit, or increase the product's waste rock and ash Size: 5MB.

GLY Exercise 4!!!☺ Dinosaur tracks are found on the roofs of underground coal seams. True. A typical predator/prey ratio among modern endotherm populations is:!!!!.

Endotherms require great motor and sensory control which is associated with larger and more complex brains. This report presents data on ultimate bearing capacity and in- place shear strength characteristics of immediate floor strata.

Plate bearing tests and borehole shear tests were conducted at five sites each in two underground coal mines in Illinois; one mining the No. 6 coal seam and the other the No. 5 coal seam. Shear Strength and Stiffness of bedding planes and discontinuities in the immediate roof rocks overlying the No.

6 Coal seam in Illinois Conference Paper Full-text available. This research determines shear strength and stiffness properties of bedding planes and joints in the roof strata rocks within to 9 m ( ft.) overlying the Illinois #6 coal seam.

The immediate floor strata underlying the Leichhardt Seam is typically mudstone, and considered to be weak, with a mean strength of approximately 20 MPa, and is as low as Author: Martin Brook, Bruce Hebblewhite, Rudrajit Mitra.

Both longwall panels extract the No. 3 coal seam which is m thick with an average overburden depth of m. The longwall with top-coal caving method was used to extract the coal seam. Roof and floor layers of the coal seam consisted of sandstone and shale, as illustrated in table 2.

The shale in the immediate floor is rich in clay (mainly Cited by: 3. During the construction and exploitation process in the Xiaojihan coal mine, which is located in Yulin of northern Shaanxi, we find a special hydrogeological phenomenon that coal seam is acted as a confined fractured aquifer.

The water-rich coal seam has natural fissures which are confined with water storage. However, the water comes from the static and original reserves in coal seams, which Cited by: 3. In underground coal mines, the failure of overlying strata can have disastrous effects where the working face is overlain by thin bedrock covered with thick alluvium.

Roof failure under these conditions can cause a massive water and sand by: 7. CHARACTERIZING TRACE ELEMENT ASSOCIATIONS IN THE PITTSBURGH NO. 8, ILLINOIS NO. 6 AND COALBURG COAL SEAMS by Shawn Michael Conaway Committee Chairman: Dr.

Gerald H. Luttrell Mining and Minerals Engineering (ABSTRACT) Coal preparation is widely regarded as a cost effective method for reducing the.

Because they are very vague, yes "C" could be correct because in a sense they are all coal, I won't get into the details of different coal because there are a few. Also "A" is correct, most of the coal seams in KY,PA,WV,IL, OH are all of Pennsylvanian Period age (Ma).

Hard coal — Froth flotation testing — Part 1: Laboratory procedure ISO/TC 27/SC 1: ISO /Cor Solid mineral fuels — Guidance on the sampling of coal seams ISO/TC 27/SC 4: ISO Solid mineral fuels — Guidance on the sampling of coal seams.

Chugh, Y.P., b, Laboratory characterization of immediate floor strata associated with coal seams in Illinois: Illinois State Geological Survey and U.S. Bureau of Mines, Final Report to Mine Subsidence Research Program, Illinois State Geological Survey, p.The coal from the Jincheng Coalfield, Qinshui Basin, is a medium- to low-ash yield anthracite.

The mineral assemblage in the anthracite is dominated by NH 4 -illite and kaolinite; with varying proportions of pyrophyllite, chlorite, pyrite, and calcite; and minor anatase, rutile, diaspore, florencite, and by: Laboratory characterization of immediate floor strata associated with coal seams in Illinois  Chugh, Yoginder (Illinois State Geological Survey, ) application/pdf.