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  • Articles  (10)
  • Coal mining  (10)
  • Springer  (10)
  • Society of Exploration Geophysicists
  • 1985-1989  (10)
  • 1965-1969
  • 1950-1954
  • Geosciences  (10)
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  • Articles  (10)
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  • Springer  (10)
  • Society of Exploration Geophysicists
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  • 1
    Electronic Resource
    Electronic Resource
    Methane emission from coal and associated strata samples (1989)
    Springer
    Geotechnical and geological engineering 7 (1989), S. 101-126 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; sorption kinetics ; outbursts ; gas emission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary This article discusses methods for providing a reliable forecast of the gas-dynamic behaviour of coal seams and adjacent strata. It shows that the ash content of carbonaceous materials determines their sorptive capacity (a universally applicable expression is presented for calculating the methane content of a sample) whilst the rate of methane desorption is a function of the degree of geological disturbance, i.e. the number and distribution of the macropores and fractures in the sample. This effect becomes less important as the sample ash content increases and effectively disappears above a certain value for high permeability materials. The quantity sorption-kinetic characteristic τ is shown to be a reliable means for quantifying methane emission behaviour. Large variations in coal sorption-kinetic characteristics are shown to occur over short distances as the geological structure of the seam changes, both vertically and horizontally. Consequently, sorption-kinetic characteristics may be used to predict the general level of methane emission from the seam and to quantify the risk of outburst inherent in disturbed areas of coal seams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01554341
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  • 2
    Electronic Resource
    Electronic Resource
    A mathematical programming approach for scheduling equipment in a surface coal mining operation (1988)
    Springer
    Geotechnical and geological engineering 6 (1988), S. 327-341 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; surface mining ; model simulation ; equipment scheduling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary A mathematical programming model for scheduling open pit mining was developed and validated using data from a surface mining operation. A two-phase solution procedure was used involving repeated evaluations of an integer scheduling model and a simple transportation model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880930
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  • 3
    Electronic Resource
    Electronic Resource
    Support capacity and roof behaviour at longwall faces with shield supports (1987)
    Springer
    Geotechnical and geological engineering 5 (1987), S. 29-57 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; hydraulic powered supports ; longwall mining ; strata control ; rock mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary Field investigations on seven U.S. longwall coal faces were carried out to examine the behaviour and interaction of roof, floor and support on longwall faces equipped with hydraulic powered supports. The most important factor in determining face stability was found to be periodic weighting and an empirical design equation was developed for support capacity. The interaction of various elements in the face system is examined and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01553531
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  • 4
    Electronic Resource
    Electronic Resource
    Subsidence prediction in shallow room and pillar mines (1986)
    Springer
    Geotechnical and geological engineering 4 (1986), S. 39-46 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; subsidence ; room and pillar mines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary A mathematical model has been developed utilizing the relative flexural strength of the strata overlying a coal seam to predict the vulnerability of shallow room and pillar mined areas to subsidence. The model assumes the failure of the immediate roof as the precursor of a subsidence event in shallow room and pillar mines. After the roof fails, either a sink hole subsidence event develops if the unconsolidated material is thin and dry; or a subsidence trough forms if the unconsolidated material is thick and wet. The model relates the Missavage number (Mn), which is dependent only on the stratigraphy and rock strength, to the extraction number, which is dependent only on the extraction ratio and maximum span of the opening. A high correlation coefficient (r=0.78) betweenMn and the extraction number for 27 subsidence events in a southern Illinois mine showed potential for using this model to delineate areas more vulnerable to subsidence. The developed and validated model was then subjected to a blind test on a 12.9 square kilometer area of an Illinois Coal Basin mine. The model successfully predicted 10 out of 12 subsidence events in the blind half of the study area and two of three additional subsidence events in the known half of the study area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01553755
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  • 5
    Electronic Resource
    Electronic Resource
    The prevention of cracking and water leakage in the concrete inner lining of frozen shafts (1986)
    Springer
    Geotechnical and geological engineering 4 (1986), S. 247-251 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; shaft sinking ; groundwater freezing ; concrete linings ; frozen ground
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560719
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  • 6
    Electronic Resource
    Electronic Resource
    Optimization of the rate of return of the mine production process (1985)
    Springer
    Geotechnical and geological engineering 3 (1985), S. 271-293 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; longwall mining ; mine planning ; mining economics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary The basic foundations of an integrational method of modelling and estimating the economic effectiveness of a deep coal mine production process is presented. The method is founded on the concept of integration of smaller structural elements into larger ones in order to obtain a representational model of the whole mine production process. It involves analysis of the spatial, engineering and time structures of the mining process. The basic structural unit of the production process is the elementary time interval,T, together with a linear function of the approximate intensity of financial outlays or effects. The repeated integration of these elementary time intervals within the spatial, engineering and time structures of the mine production process can be extended to model the whole mine or discrete spatial structure elements. The model may be used to investigate the trends of financial outlays and effects, and their current values updated for arbitrarily assumed updating moments. The model can also be used as an investigation tool for analysing the economical effectiveness of the mine production process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880839
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  • 7
    Electronic Resource
    Electronic Resource
    Stresses and displacements due to underground mining using a finite element procedure (1985)
    Springer
    Geotechnical and geological engineering 3 (1985), S. 49-63 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; longwall mining ; subsidence ; stress distribution ; finite element analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary A two dimensional finite element procedure is applied to simulate a coal mining excavation sequence. A procedure with linear solution steps is developed and applied to an idealized mountain cross-section with exceptionally thick coal seams and large dip angle. The results provide information on pillar pressure, floor and roof stability, displacement characteristics and surface subsidence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881341
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  • 8
    Electronic Resource
    Electronic Resource
    An analysis of coal bump liability in a bump prone mine (1985)
    Springer
    Geotechnical and geological engineering 3 (1985), S. 243-259 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; bumps and bursts ; coal pillars ; laboratory testing ; underground measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary This paper presents an analysis of causes of bump in a deep coal mine. The analysis consists of in-mine measurement determination, analysis of physical and mechanical properties of mine materials and simulation of mine layout and mining sequence. Major factors contributing to the causes of bump have been reviewed and those that are related to this case have been identified and simulated analytically using a three-dimensional finite element method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880837
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  • 9
    Electronic Resource
    Electronic Resource
    Statistical interpretation of gate roadways deformation data in the UK (1985)
    Springer
    Geotechnical and geological engineering 3 (1985), S. 261-270 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; longwall mining ; gate roadways ; rock deformation ; databases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary The uniformity of measurements of deformation in underground coal mine roadways is discussed. Hence the validity of using such results for predicting the likely behaviour of similar workings is examined. It is further attempted to isolate those geological and mining parameters which influence closure. These results are compared with those from West Germany and France.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880838
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  • 10
    Electronic Resource
    Electronic Resource
    A physical model of an underground coal mine prototype (1985)
    Springer
    Geotechnical and geological engineering 3 (1985), S. 319-326 
    Details
    ISSN: 1573-1529
    Keywords: Coal mining ; longwall face ; subsidence ; physical modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Conclusions A physical model simulated qualitative ground movement above a retreating longwall face in a shallow coal mine with considerable accuracy, after modification to allow for scale effects. It is considered that in prototype geometries such as mines where strata deformation involves rock fracture, the use of physical models may have advantages over other types of model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880842
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