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Tuesday, July 21, 2020 | History

2 edition of Single-entry development for longwall mining found in the catalog.

Single-entry development for longwall mining

Melvin E. Poad

Single-entry development for longwall mining

research approach and results at Sunnyside No. 2 mine, Carbon County, Utah

by Melvin E. Poad

  • 377 Want to read
  • 37 Currently reading

Published by Dept. of the Interior, Bureau of Mines in [Washington] .
Written in English

    Subjects:
  • Coal mines and mining.,
  • Tunneling.

  • Edition Notes

    Bibliography: p. 29.

    Statementby Melvin E. Poad, Galen G. Waddell, and Earl L. Phillips.
    SeriesReport of investigations - Bureau of Mines ; 8252, Report of investigations (United States. Bureau of Mines) -- 8252.
    ContributionsWaddell, Galen G., Phillips, Earl L., United States. Bureau of Mines.
    The Physical Object
    Pagination[3], 23 p. :
    Number of Pages23
    ID Numbers
    Open LibraryOL18012559M

    ri / single-entry development for longwall mining, research approach and results at sunnyside no. 2 mine, carbon county, utah, pb, $ 32 ri / interactive approximation techniques for microseismic source location, pb, $ 26 ri / effects of hydraulic stimulation on coalbeds and . ic / multislice mining for thick western coal seams, pb, $ 28 ic / review of single-entry longwall mining technology in the united states, pb, $ 25 ic / user’s manual for the usbm in situ copper oxide mining cost models, pb, $ 6

    Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions. Punch longwall mining is carried out using single entry gateroads as the they are only used by one panel. The adjacent panels can be similarly extracted with fresh entries being driven adjacent to the previous mined out panel leaving a barrier pillar of suitable width to provide safe retreating of the new panel as shown in Figure 2 opposite.

    longwall mining Download longwall mining or read online here in PDF or EPUB. Please click button to get longwall mining book now. All books are in clear copy here, and all files are secure so don't worry about it. This site is like a library, you could find million book here by . Figure depicts some of the commonly used ventilation layouts used on longwall sections. In the U.S., a minimum of two entries is required, while single entry longwalls are primarily em - ployed in European coal mines (Fuller, ; McPherson, ). System layouts become more complex when mining under inclined, thick, and gassy coalFile Size: KB.


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Single-entry development for longwall mining by Melvin E. Poad Download PDF EPUB FB2

Design Single-entry development for longwall mining book a Single-Entry Development System For Retreat Longwall Mining Systems (A Minerals Research Contract Report November ) [Inc. Ketron] on Author: Inc.

Ketron. Get this from a library. Single-entry development for longwall mining: research approach and results at Sunnyside No. 2 mine, Carbon County, Utah. [M E Poad; Galen G Waddell; Earl L Phillips; United States. Bureau of Mines.] -- This Bureau of Mines report presents two phases of a research program to evaluate a single-entry system for longwall development.

Longwall mines produce more than 30 pct of all underground coal, up from 5 pct just 15 years ago. The continued growth of longwall mining without appropriate multiple-seam planning may increase the cost and risk of mining. Optimization of the mine design factors is arguably the primary means for controlling interactions between operations.

Information Circular Review of Single-Entry Longwall Mining Technology in the United States By F. Jenkins and E. Cullen UNITED STATES DEPARTMENT OF THE INTERIOR Manuel Lujan, Jr., Secretary BUREAU OF MINES T S Ary, Director Sy & * > -o Library of Congress Cataloging in Publication Data: Jenkins, F.

Michael. Joy complete longwall systems represent the ultimate solution for high-production longwall mining. Joy incorporates best-in-breed shearers, roof supports, face conveyors, stageloaders, crushers, and mobile belt tail pieces to deliver a complete longwall system that is in a class of its own.

Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically – m (2 ft 0 in–3 ft 3 in) thick).

The longwall panel (the block of coal that is being mined) is typically 3–4 km (– mi) long and – m (–1, ft). Includes bibliographical references (p.

) Review of single-entry longwall mining technology in the United States Item PreviewPages: Download Coal Mine Structures is based on a six-year study, carried out at the University of Newcastle upon Tyne between and and financed by the National Coal Board and the European Coal and Steel Community (Projects - ACj and - ACj), into the behaviour of under ground openings in British coal mines.

As more easily mined deposits are depleted, the reserves are becoming more limited and less favorable. Deposits of coal or trona that are being longwall mined are deep and are getting deeper.

Coal bursts and bumps frequently occur within development entries in longwall mining of deep mines due to high stresses. This paper presents a novel patented longwall mining layout “Longwall Mining with Cited by: 9. Single-entry development for longwall mining: research approach and results at Sunnyside No.

2 mine, Carbon County, Utah / ([Washington, D.C.]: Dept. of the Interior, Bureau of Mines, []), by Melvin E. Poad, Earl L. Phillips, and Galen G. Waddell (page images at HathiTrust).

@article{osti_, title = {A cooperative study of gate entry designs: Welbeck Colliery (UK) and Jim Walter Resources (USA)}, author = {Hendon, G and Carr, F and Lewis, A and Cassie, J}, abstractNote = {Longwall developments in the UK have historically consisted of single entry gate roads.

Adjacent developments were separated from existing pales by large barrier pillars (designed of. Advanced guidelines for performance testing of two-legged longwall shields / ([Avondale, Md.]: U.S.

Dept. of the Interior, Bureau of Mines, ), by Thomas M. Barczak (page images at HathiTrust) Review of single-entry longwall mining technology in the United States / (Pgh.

Figure depicts some of the commonly used ventilation layouts used on longwall sections. In the U.S., a minimum of two entries is used, while single entry longwalls primarily are employed in European coal mines (Fuller, ; McPherson, ).

Refer to Chapter 17 for Size: KB. Continuous miners, used primarily in ‘room and pillar’ mining and also to prepare roadways in a ‘longwall’ systems, have incrementally improved over the last 20 years (Fig.

).But they are not advancing in automation as quickly as longwall equipment, with the exception that they are more often remotely controlled by an operator, rather than by an operator sitting on the machine. Single-entry development for longwall mining Melvin E.

Poad Not In Library. Cut-and-cover tunneling G. Wickham Not In Library. Congresses, Tunnels, Accessible book, Underground construction, Design and construction, Protected DAISY, Rock mechanics, History.

Results of the first trial single entry development at Ellalong Colliery / by D. Wallman; New mining methods - single entry: final report on field trials at Ellalong Colliery / by D.

Wallman; Geomechanical monitoring of longwall extraction at Ellalong Colliery: first progress report / by J. Pal. This study is an effort to determine legal and technical constraints on the introduction of single entry longwall systems to US coal mining.

US mandatory standards governing underground mining are compared and contrasted with regulations of certain foreign countries, mainly continental Europe, relating to the employment of longwall mining. The #2 entry is subject to substantial ground movement and loading during its function as an air course because it is a single entry between two longwall gobs.

Secondary support is regularly applied in this entry to maintain air course functionality during second panel ch on performance and design of secondary supports has been. The demand for increased productivity and the problems associated with mining at greater depths have increased the interest in using the yield pillar concept in the United States.

This paper summarizes chain pillar behaviour in a mine that historically experienced coal bumps in both room-and-pillar and longwall sections.

Results indicate that, generally, the chain pillars yield as designed Cited by: 5. A novel backfill material for roof supports in the cut-through entries of longwall mining single-entry system was applied to the the final development of pan el is the.

Extraction of coal from a pillar between two roads is practised in both cases. With bord and pillar mining and subsequent extraction of pillars - dependent on the size of room and pillar widths - some 30% of part of a deposit is exposed through development and roads.

With longwall mining only 5% .Longwall abutment loads are influenced by several factors, including depth of cover, pillar sizes, panel dimensions, geological setting, mining height, proximity to gob, intersection type, and.The novel approach “Longwall Mining with Split-level Gateways (LMSG)”, which is an innovative patent invented by Dr.

Zhao, J.L in at China University of Mining and Technology (Beijing) [7,8], is being employed for the coal mine of interest as shown in Figure 2.

The gateways on either end are located at different heights within the coal Cited by: