- About
-
The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 481 to 490 of 2497 (0.026 seconds)Spelling suggestions: "subject:"bonecoal"" "subject:"confocoal""
| 481 |
Assessing the cumulative environmental impact from surface mining operationsPlatt, Lucy Teresa January 2002 (has links)
No description available.
|
| 482 |
A study of track stability for locomotive transportation in British coal minesHumphreys, Michael Peter January 1990 (has links)
No description available.
|
| 483 |
Developments in computer modelling for the valuation of group mining companiesBasiri, Mohammad Hossein January 2000 (has links)
No description available.
|
| 484 |
Development of conventional and microbubble flotation techniques to produce high purity coal for coal-water mixture fuelsChoung, J. W. January 1988 (has links)
No description available.
|
| 485 |
Identification of the low temperature combustion products from coal and a study of their effect on metal oxide semiconductorsGibson, S. January 1988 (has links)
No description available.
|
| 486 |
Long-term stability of major coal mining tunnel projectsKapusniak, S. January 1986 (has links)
No description available.
|
| 487 |
Laboratory studies of pumping characteristics of processed liquid tailings with particular reference to stability and time dependant propertiesBarkhordarian, A. January 1988 (has links)
No description available.
|
| 488 |
An investigation into the liberation characteristics of coal middlingsOliver, Edmund T. January 1989 (has links)
No description available.
|
| 489 |
Assessment of the cutting characteristics of coal seams by in situ testing methodsEvenden, M. P. January 1987 (has links)
No description available.
|
| 490 |
Processing and modelling of seismic reflection data acquired off the Durham coastJifon, Francis January 1985 (has links)
Off the Durham coast, the Permian succession above the Coal Measures contains limestones and anhydrite bands with high seismic velocities and reflection coefficients. The consequent reduction in penetration of seismic energy makes it difficult to determine Coal Measures structure by the seismic reflection method. Seismic data sets acquired from this region by the National Coal Board in 1979 and 1982 are used to illustrate that satisfactory results are difficult to achieve. Synthetic seismograms, generated for a simplified geological section of the region, are also used to study various aspects of the overall problem of applying the seismic technique in the area. Standard and non-standard processing sequences are applied to the seismic data to enhance the quality of the stacked sections and the results are discussed. This processing showed that in the 1979 survey, in which a watergun source and a 600m streamer were used, some penetration was achieved but Coal Measures resolution on the final sections is poor. The 1982 data set, shot along a segment of the 1979 line using a sleeve exploder source and a 150m streamer, showed no Coal Measures after processing. Synthetic seismograms, generated using the reflectivity method and a broadband source wavelet, are processed to confirm that a streamer with a length of 360 to 400m towed at a depth of 5-7.5m will be optimal for future data acquisition in the area. It is also shown that the erosion of the surface of the limestone lowers the horizontal resolution of the Coal Measures. Scattering
|
Page generated in 0.0335 seconds